Location County State/Province Directions,Notes Age Formation Fossils Comments Reference Lat-Long
North Central IA – IA in regional exposures Devonian stromatoporoids IA0001
Crescent Adair IA In quarry Pennsylvanian Stark Fish bones IA0002
Greenfield Adair IA In quarry Pennsylvanian Stark Fish-Agassizodus IA0003
Harrison Township Adair IA in Sec 27 in ravine on hillside. fish fragments,crinoid stems,bryozoa,brachiopods IA0004
Lansing Allamakee IA 1 km S Cambrian Upper Eau Claire Saratogia IA0005
Lansing Allamakee IA 5 km W on hillside 3 meters above road on N side Cambrian Upper St Lawrence Dikelocephalus IA0006
Lansing Allamakee IA at Fire-Bell Hill Cambrian Upper St Lawrence Illaenurus IA0007
Eldorado Benton IA Ordovician Maquoketa Trilobites-Anataphrus IA0008
Waterloo Black Hawk IA Mississippian Kinderhook Crinoids IA0009
Waterloo Black Hawk IA Mississippian Kinderhook Crinoids IA0010
Waterloo Black Hawk IA Pints Quarry,In Devonian Cedar Valley Limestone Arthrodire fish – Macropetalichthys,Rhynchodus,Ptychodus IA0011
Boonsboro Boone IA pelecypod Edmondia IA0012
Madrid Boone IA Pennsylvanian Labette mollusks Pteria,Dunbarella,Edestid shark spines,sharks Listracanthus IA0013
Waverly Bremer IA in limestone Devonian Hamilton fish-Ptyctodus,Rhynchodus IA0014
Brandon Buchanan IA E along Lime Creek in Cemetery in Limestone crinoid fragments IA0015
Brandon Buchanan IA SE IN interurban RR cuts in Limestone Devonian Cedar Valley crinoid fragments IA0016
Brandon Buchanan IA along Lime Creek E of Cemetery in abandoned and active quarries. Atrypa,edrioasteroids -Agelacrinites IA0017
Brandon Buchanan IA on Cedar River SW of Brandon brachiopods Douvillina IA0018
Littleton Buchanan IA below Littleton dam on both sides of Wapsipinicon River Devonian Cedar Valley Hexagonaria,cephalopods,Favosites,Cryptophyllum,brachiopods – Stropheodonta,Atrypa,Spirifer; crinoid stems,bryozoa IA0019
Lewis Cass IA in banks of Nishnabotna River accessible on abandoned road from Cold Springs State Park Pennsylvanian Oread fusulinids,a few shark teeth,brachiopods,bryozoa,fusulinids IA0020
Clarence Cedar IA Silurian Niagara Falls dolomite trilobites – Metopolichas,Cheirurus IA0021
– Cerro Gordo IA Devonian brachiopods -Schizophoria IA0026
Bird Hill Cerro Gordo IA 1.6km W on B47 Devonian Upper Hackberry (IA) Corals,Brachiopods – Atrypa,Theodossia,Spirifer,Productella,Productella,Cyrtospirifer,Tenticospirifer. Stromatoporoid -Idiostroma IA0022
Hackberry Cerro Gordo IA 5 km W at Bird Hill ? IA0023
Nora Springs Cerro Gordo IA ‘Hackberry Fauna’ exposures at Claybank Forest Park Devonian Devonian Fossils presumably similar to those at Rockford,IA IA0024
Portland Township Cerro Gordo IA nw1/4 sw1/4 s31 trilobites – Goldius IA0025
Elkader Clayton IA 3-10 meters below Galena dolomite in small creek 2 km SW Ordovician Platteville, Upper trilobites -Illaneus IA0027
Marion Township Clayton IA nw1/4 se1/4 s19 along left bank of a small North flowing tributary of the Turkey River in shaley Limestone Ordovician Elgin trilobite fragments – Isotelus,graptolites IA0028
McGregor Clayton IA 6 km SW along Sny Magill Creek in Limestone Ordovician Platteville trilobite – Ceraurus IA0029
McGregor Clayton IA 6 km SW in Boyles Quarry in Limestone Ordovician Platteville trilobite – Ceraurus,Eoharpes IA0030
McGregor Clayton IA N to Minnesota line in Cambrian Upper Sandstones along Mississippi River Cambrian Upper a few fossils IA0031
McGregor Clayton IA along Sny Magill Creek in Limestone exposures Ordovician Platteville trilobite – Ceraurus IA0032
Sperry Township Clayton IA S of center of Sec 11 Ordovician Galena Crinoids IA0033
Strawberry Pt Clayton IA area quarries Silurian fossils IA0034
Clinton Clinton IA Silurian Niagaran graptolites,trilobites – Goldius IA0035
Clinton Clinton IA from US30 N to US20 in quarries and roadcuts Silurian Fossils IA0036
Boyer Crawford IA N along Porter Creek in bench 10 meters above Creek mollusks IA0037
Boyer Crawford IA N at lower end of valley in blue-gray silt mollusks IA0038
Boyer Crawford IA in area streams and gullies gastropods and bivalves IA0039
Redfield Dallas IA in clayey shale Pennsylvanian Xiphosura – Euproops IA0040
Bloomfield Davis IA Ordovician Maquoketa, Lower trilobites – Encrinurus IA0041
Elgin Davis IA Ordovician Maquoketa Calymene IA0043
Elgin Davis IA Ordovician Maquoketa, Lower Trilobites -Isotelus IA0042
Elgin Davis IA in road cuts along Turkey River SW of town in Elgin member of Ordovician Maquoketa trilobites and Ammonites IA0044
Clermont Davis? IA near junction of Otter Creek and Turkey River Ordovician Maquoketa, Lower Trilobites – Isotelus IA0045 Clermont is in Fayette Cy. Is this location perhaps in Davis County?
Edgewood Delaware IA area quarries Silurian fossils IA0046
Manchester Delaware IA 4 km W Silurian Upper Niagara Falls Limestone graptolites,trilobites – Illaneus IA0047
Manchester Delaware IA area quarries Silurian fossils IA0048
Augusta Des Moines IA Mississippian Lower Burlington Limestone crinoids,Shark teeth — hybodonts,Psammodus IA0049
Augusta Des Moines IA 1 km N in area exposures Mississippian Keokuk typical faunas IA0050
Augusta Des Moines IA Rare crinoid crowns in crinoidal limestone Mississippian Lower Burlington Limestone crinoids IA0051
Burlington Des Moines IA Crinoids Eutrochocrinus,Agaricocrinites IA0052
Burlington Des Moines? IA at Prospect Hill in Mississippi River bluffs for 3 km Mississippian Kinderhook sponges,crinoid stems,Brachiopods,pelecypods,cephalopods,crustacea,fish,worms,bryozoa,corals,plants IA0053
– Dubuque IA 3 meters N of Mississippi River Bridge 2 meters above low water Eoharpes IA0064
Catfish Creek Dubuque IA near mouth Ordovician Platteville Limestone Ceraurus IA0054
Center Township Dubuque IA ne1/4 s29 2 meters above NW flowing tributary of Little Maquoketa River Orthoceras IA0055
Dubuque Dubuque IA 6.5 km N in cuts of Chicago,Milwaukee and St Paul RR Ordovician Platteville trilobites – Basilicus,other fossils. IA0056
Dubuque Dubuque IA at City Quarries on W 14th St Ordovician Galena dolomite trilobites – Illaneus and 1 other fossil species IA0057
Florenceville Dubuque IA area outcrops Ordovician Galena|Platteville trilobites – Brachyaspis IA0058 Brachyaspis is Isotelus
Florenceville Dubuque IA on River above town Ordovician Maquoketa Trilobites – Homotelus IA0059
Graf Dubuque IA Ordovician Maquoketa, Lower Calymene IA0060
Graf Dubuque IA 500 meters above Lingula,Orthoceras,Leptobolus,+ 14 other species. IA0061
Graf Dubuque IA at RR station 14 km W of Dubuque and 2 km N of IA20 Ordovician Maquoketa nautiloids IA0062
Graf Station Dubuque IA at ICCR station 12.8km No of Dubuque and 2.4km N of US 20 Ordovician Maquoketa Straight cephalopods. IA0063
Brainard Fayette IA Ordovician Maquoketa|Brainard trilobites – Calymene IA0065
Clermont Fayette IA Ordovician Maquoketa Calymene IA0067
Clermont Fayette IA Ordovician Maquoketa, Lower trilobites – Megalaspis IA0066
Clermont Fayette IA in dry stream beds along County road Y in Elgin member of Ordovician Maquoketa trilobites and Ammonites IA0068
Clermont Fayette IA in road cuts along Clermont-Elgin road in Elgin member of Ordovician Maquoketa trilobites and Ammonites IA0069
Clermont Township Fayette IA In creek banks above bridge in center of S35 trilobites,graptolites IA0070
Clermont Township Fayette IA in area shale outcrops trilobites,graptolites IA0071
Dover Mills Fayette IA Ordovician Maquoketa Calymene IA0072
Pleasant Valley Township Fayette IA at Patterson Springs w1/2nw1/4s20 in Limestone abundant Cornulites,Hebertella,Plectambonites,Leptaena,Calymene,Crinoid stems (Dendrocrinus) IA0073
Postville Junction Fayette IA Ordovician Maquoketa, Lower trilobites – Megalaspis IA0074
– Floyd IA area exposures Devonian Lime Creek Shale barnacles – Lepidocoleus IA0088
Nora Springs Floyd IA Coral Actinostroma IA0075
Nova Springs Floyd IA Williams Quarry corals,edrioasteroids,cystoids IA0076
Rockford Floyd IA pelecypod Spinatrypa IA0077
Rockford Floyd IA Devonian Brachiopods;Cephalopods Imitoceras IA0078
Rockford Floyd IA 5 km S and .5 km W of Rockford Brick Co Pit on County Rd Devonian Upper Hackberry (IA) Corals,Brachiopods,Corals. IA0079
Rockford Floyd IA 700 meters SW of Rockford Brick and Tile Company on County Road D Devonian Hackberry (IA) brachiopods,gastropods,coral IA0080
Rockford Floyd IA In Allied Construction Company (Charles City,IA) pit 2 km W of Rockford on County Rd B47 in Map FQ Spring 84 p11. N1/2S16R18WT95N Devonian Juniper Hill|Cerro Gordo (IA) Brachiopods – Cranaena – with traces of original shell coloring. IA0081
Rockford Floyd IA Prairie park is maintained by the Floyd County Conservation Board. It is full of Devonian age fossils found in the Lime Creek Formation. the Lime Creek Formation is part of the Devonian rock system that can be found in Cerro Gordo and Floyd counties. Devonian Lime Creek ? IA0082
Rockford Floyd IA area limestones corals,brachiopods,crinoids IA0083
Rockford Floyd IA in road cut on County Rd D brachiopods,corals IA0084
Rockford Floyd IA in.5 km S and 6 km W of Rockford Brick Co Pit Devonian Upper Hackberry (IA) Corals,Brachiopods,Corals. Brachiopods – Atrypa,Theodossia,Spirifer,Productella,Productella,Cyrtospirifer,Tenticospirifer. Stromatoporoid – Idiostroma IA0085
Rockland[?] Floyd IA brachiopods – Schuchertella,Linoproductus,Juresania IA0086 There doesn’t seem to be a Rockland,Iowa. Rockford? But the genera above are Pennsylvanian. Rockford is Devonian.
Williams Quarry at Nova Springs Floyd IA Edrioasteroids and Cystoids IA0087
Chapin Franklin IA 2 km W in cherty dolomite Mississippian Lower Maynes Creek abundant corals IA0089
Geneva Township Franklin IA in abandoned quarry in S10 silicified fossils Schellwienella,Productus,Camarotoechia,Spirifer,Cleiothyridina,fish spines IA0090
Geneva Township Franklin IA in abandoned quarry in S14 silicified fossils Schellwienella,Productus,Camarotoechia,Spirifer,Cleiothyridina,fish spines IA0091
Hampton Franklin IA 2 km NW of town in quarry on Spring Creek many species of corals,brachiopods,crinoids,pelecypods IA0092
Hampton Franklin IA 5 km NE in quarry many species of corals,brachiopods,crinoids,pelecypods IA0093
Hampton Franklin IA In N part of town in quarry on Spring Creek many species of corals,brachiopods,crinoids,pelecypods IA0094
Ross Township Franklin IA In SW corner s29 abundant fossils – corals,blastoids,brachiopods. bryozoa,gastropods,pelecypods IA0095
Sheffield Franklin IA In S17 of West Fork Township Devonian Upper Sheffield Cleiothyridina,Productus,Camarotoechia,Spirifer,silicified fossils IA0096
Bartlett Fremont IA At Kaser Bros Quarry Pennsylvanian Holt vertebrates-Agassizodus IA0097
Beaman Grundy IA along Wolf Creek Mississippian Kinderhook Zaphrentis; brachiopods-Schellwienella,Camarotoechia,Rhipidomella,Dielasma,Spirifer; Conocardium,Straparollus,Loxonema IA0098
Conrad Grundy IA along Wolf Creek Mississippian Kinderhook Zaphrentis. Schellwienella,Camarotoechia,Rhipidomella,Dielasma,Spirifer,Conocardium,Straparollus,Loxonema IA0099
Stewart Guthrie IA Pennsylvanian Hertha vertebrates-Petrodus IA0100
Eagle City Hardin IA in banks of Iowa River Mississippian Lower Kinderhook, Upper brachiopods – Leptaena,Orthoceras,Schellwienella,Productus,Spirifer,Reticularia; Bryozoa – Chaetetes,Rhombopora,Fenestella; Gastropods – Orthonychia,Straparollus IA0101
Iowa Falls Hardin IA SE in old Ellsworth Stone quarry Zaphrentis,Orophocrinus,Platycrinus,Schellwienella,Rhipidomella,Spirifer,Reticularia,Aviculopecten,Bellerophon. Igoceras,Loxonema,Straparollus IA0102
Iowa Falls Hardin IA in old quarry on Iowa River at power plant Zaphrentis,Orophocrinus,Platycrinus,Schellwienella,Rhipidomella,Spirifer,Reticularia,Aviculopecten,Bellerophon; Igoceras,Loxonema,Straparollus IA0103
Iowa Falls Hardin IA to W in Wild Cat Glen Zaphrentis,Orophocrinus,Platycrinus,Schellwienella,Rhipidomella,Spirifer,Reticularia,Aviculopecten,Bellerophon. Igoceras,Loxonema,Straparollus IA0104
Henry County Henry IA se1/4s17t71nr6e on side of Big Creek Mississippian Upper Pella Griffithides IA0105
Jackson Township Henry IA At Webster’s Mill in W part of Section (What Section?) along a tributary of Skunk River Mississippian Keokuk fossils(4) IA0106
Jackson Township Henry IA Sec 4 along small tributary of Skunk River Griffithides IA0107
Mount Pleasant Henry IA Mississippian Keokuk Fish teeth-Sandalodus IA0108
Oakland Mills Henry IA Mississippian Lower Burlington Limestone Shark Teeth,Deltodus IA0109
Ollie Henry IA Mississippian Upper Pella trilobites -Griffithides(4) IA0110
Ottumwa Henry IA Mississippian Upper Pella trilobites -Griffithides(4) IA0111
Dakota City Humboldt IA Hodges Quarry Mississippian Gilmore City Limestone Trilobites-Perexigupyge,Richterella,Proetides IA0112
Humboldt Humboldt IA in Hodges Quarry in limestone lenses Mississippian Gilmore City mollusks,brachiopods,ostracods IA0113
Bellevue Jackson IA N through Dubuque to Minnesota line along Mississippi River Ordovician St Peter Sandstone Galena Dolomite,Maquoketa shale. IA0114
Maquoketa Jackson IA Casts of fossils. Coral-Neozaphrentis IA0115
Monmouth Jackson IA gastropods-Trochonema IA0116
St Donatus Jackson IA Prairie Spring Township along Mort[?] Creek limestone and shale Ordovician Galena 20 species of fossils IA0117 Most likely ‘Tete des Mortes’ Creek which is just S of town
Tete de Mort Township Jackson IA In soft brown shales along creek near Sec 13-14 boundary abundant fossils IA0118 ‘Tete des Mortes’ perhaps
Kellogg Jasper IA Mississippian Keokuk Limestone shark spines to 70cm – Physonemus IA0119
Kellogg Jasper IA In limestone quarry Mississippian Keokuk Fish fins-Physonemus IA0120
Round Prairie Township Jefferson IA In S bank of Rock Creek ne1/4 ne1/4 s32 Protozoa,coral Pentremites,Archeocidaris spines and plates,crinoid stems,Vermes – Spirorbis?; Bryozoa -Anisotrypa,Fenestella; brachiopods; pelecypods – Allorisma;Arthropods – Cytherellina; fish bones IA0121
Brandon Johnson IA area exposures Devonian Cedar Valley trilobite – Proteus IA0122
Brandon Johnson IA area exposures Devonian Lower Independence Shale[?] trilobite – Cyphaspis IA0123 USGS has the Independence formation as Pleistocene
Cedar Rapids Johnson IA Devonian Cedar Valley Limestone Blastoids, IA0124
Coralville Johnson IA Corals-Striatopora,Hexagonaria,Favosites;bryozoa-Thamniscus;brachiopods-Atrypa IA0125
Coralville Johnson IA Devonian Fossils IA0126
Coralville Johnson IA in gorge S of Dam spillway http://www.hq.usace.army.mil/cepa/pubs/jan02/story18.htm Devonian diverse fossils IA0127
Elmira Johnson IA 1 km N Devonian Middle Davenport trilobites -Proteus IA0128
Iowa City Johnson IA In limestones Devonian Middle Hamilton trilobites – Asteropyge IA0129
Iowa City Johnson IA N of Park Bridge in abandoned quarry Devonian Cedar Valley Proetus IA0130 Both ‘Proetus’ and ‘Proteus’ spellings are commonly used — apparently interchangeably
Iowa City Johnson IA N on Templin road,Red Ball Road Devonian Cedar Valley Proetus IA0131
Johnson County Johnson IA area stream gravels silicified Favosites IA0132
Linn Junction Johnson IA along old Chicago,Milwaukee and St Paul RR cut Devonian Middle Wapsipinicon Proetus IA0133
Linn Junction Johnson IA in area outcrops Devonian Middle Wapsipinicon Proetus IA0134
New Buffalo Johnson IA Devonian Cedar Valley Vertebrates-Dipterus IA0135
New Buffalo Johnson IA In limestones Devonian Middle Hamilton trilobites – Asteropyge IA0136
Searstown Johnson IA In limestones Devonian Middle Hamilton trilobites – Asteropyge IA0137
State Quarry Johnson IA In bone bed Devonian Upper State Quarry fish-Ptyctodus IA0138
Keokuk Keokuk IA At Des Moines Rapids in Mississippi River Mississippian Keokuk Fish teeth-Cladodus,Cochliodus,Deltodus,Sandalodus IA0139
Keswick Keokuk IA Mississippian Keokuk Limestone Shark Spines Physonemus,Teeth — Cladodus,Helodus,Deltodus,Chomatodus IA0140
Keswick Keokuk IA In limestone quarry Mississippian Keokuk Fish fins-Physonemus IA0141
Ollie Keokuk IA 2 km NW Mississippian Upper Pella Griffithides IA0142
South English Keokuk IA Mississippian bradyodont shark teeth-Sandalodus IA0143
– Lee IA Mississippian Keokuk Limestone shark teeth — Ctenoptychius IA0155
Belfast Lee IA 2 km NE along E branch of Monk Creek in se1/4s36t67nr72 silicified coral – Lithostrotion,Syringopora IA0144
Belfast Lee IA 4 km W Mississippian St Louis Lithostrotion,Conularia,Orbiculoidea IA0145
Belfast Lee IA 4.5 km W in stream bank at sharp bend Mississippian St Louis Girtyella,Spirifer,Myalina,Aviculopecten,Modiomorpha,Conocardium,Bellerophon IA0146
Belfast Lee IA in River Bluffs below town Mississippian St Louis Lithostrotion,Conularia,Orbiculoidea IA0147
Croton Lee IA along banks of Creek emptying into Des Moines River Mississippian Upper Pella Limestone brachiopods-Productus,Pugnoides,Girtyella,Spirifer,Composita;Pelecypods- Edmondia,Schizodus,Allorisma Trilobites – Phillipsia. IA0148
Denmark Lee IA 4 km NW,In a bluff Mississippian Keokuk Orthothetes,Spirifer,Conularia,Cleiothyridina,Reticularia,Tetracamera,Pustula,Productus IA0149
Keokuk Lee IA Mississippian fossils,geodes IA0150
Keokuk Lee IA Montrose Trilobites -Griffithides IA0151
Keokuk Lee IA along Soap Creek full exposures of Keokuk Limestone beds Mississippian Keokuk corals,bryozoa,brachiopods pelecypods,gastropods,fish teeth – Sandalodus,crinoids,etc IA0152
Keokuk Lee IA at Galland Station Trilobites -Griffithides IA0153
Keokuk Lee IA in quarry in Mississippi river bank near mouth of Soap Creek full exposures of Keokuk Limestone beds Mississippian Keokuk corals,bryozoa,brachiopods pelecypods,gastropods,fish teeth – Sandalodus,crinoids,etc IA0154
Linn County Linn IA Area streambeds silicified corals IA0156
Linn County Linn IA In area exposures Silurian Niagaran Trilobites – Encrinurus IA0157
Linwood Linn IA Local quarries and a creekbed between Linwood and Buffalo Porifera – Hexagonaria. Mollusk – Hyolithes,Crinoid plates Onychocrinus,Brachiopods,Spinocyrtia,Gypidula,Composita,Merista,Fascifera,Hebertella IA0158
Burlington Louisa IA Mississippian Waverly (IA)? Fish-Ctenacanthus IA0159
Burlington Louisa IA In road cut horn corals IA0160
Burlington Louisa IA N along base of Mississippi River bluff Devonian Maple Mill many fish species plus sponges,crinoid stems,brachiopods,a pelecypod,gastropods,Gomphoceras IA0161
Burlington Louisa IA Rare crinoid crowns in crinoidal Mississippian Lower Burlington Limestone crinoids IA0162
Elrick Junction Louisa IA 2 km SE in creek bed an banks Helodus teeth,Chonopectus,Athyris,Chonetes,Edmondia,Spirifer,Paryphorhynchus,Orthothetes,abundant mollusks. IA0163
Long Creek Louisa IA In area Limestone deposits Orthothetes,Chonopectus,Aviculopecten,Productus,Rhipidomella,Macrodon,Orthoceras,Conularia,Edmondia IA0164
Louisa County Louisa IA In County Quarry in s23t73nr3w Hampton age fossils Mississippian North Hill Oolite Spirifer,Camarophorella,Productus,Leptaena,Reticularia,Bucanopsis IA0165
Morning Sun Louisa IA Mississippian Keokuk Limestone Crinoids IA0166
Morning Sun Louisa IA N and E in bluffs and creeks Spirifer,Productella,Spirifer,Athyris,Zaphrentis,Orthoceras,Helodus,brachiopod casts. IA0167
Morning Sun Louisa IA Rare crinoid crowns in crinoidal Mississippian Lower Burlington Limestone ? IA0168
Smith Creek Louisa IA Devonian Maple Mill many fish species plus sponges,crinoid stems,brachiopods,a pelecypod,gastropods,Gomphoceras IA0169
Smith Creek Louisa IA W of center of sw1/4s29t73nr2w Mississippian Kinderhook sponges,crinoid stems,Brachiopods,pelecypods,cephalopods,crustacea,fish,worms,bryozoa,corals,plants IA0170
St Charles Madison IA Pennsylvanian Hertha vertebrates-Petrodus IA0171
St Charles Madison IA Pennsylvanian Hertha Limestone Conodonts,Dermal ossicles from Petrodus IA0172
Winteret Madison IA At Devil’s Backbone Pennsylvanian Hushpuckney Shale Pelecypod-Euchondria http://books.google.com/books?id=svVskArvqRAC&pg=PA116&lpg=PA116&dq=abbott+pennsylvanian+fossils&source=web&ots=lOtHaJf56y&sig=NJ5TQEVUMG0nHqmfhmFd1_ZhOUg#PPA113,M1
Winterset Madison IA vertebrates-Deltodus,Sandalodus IA0173
Winterset Madison IA 8 km W in ravine on N side of Middle River Pennsylvanian Cherryvale Shale typical faunas IA0174
Winterset Madison IA SW in ravine Pennsylvanian Bethany Falls Limestone Myalina,Orthothetes,Chonetes,Composita,crinoid stems IA0175
Winterset Madison IA at Devil’s Backbone Pennsylvanian Hushpuckney Shale pelecypods – Streblochondria IA0176
Freeport Mahaska IA Calamites IA0177
Fremont Mahaska IA Mississippian Upper Pella trilobites -Griffithides(4) IA0178 Original says Henry County
Fremont Mahaska IA 5 km N Mississippian Upper Pella Griffithides IA0179
New Sharon Mahaska IA Devonian brachiopods-Mucrospirifer,corals,bivalves IA0180
Oskaloosa Mahaska IA E of US63 in abandoned quarry on Skunk River small blastoids,corals,trilobites IA0181
Harvey Marion IA Mississippian Pella beds Mississippian St Louis Limestone Edrioasteroids Lepidodiscus, IA0182
Harvey Marion IA Pella beds in abandoned quarry Mississippian St Louis ? IA0183
Pella Marion IA 1 km SW in abandoned quarry in overlying shales Mississippian Upper Pella corals,blastoids,brachiopods,pelecypods,trilobites IA0184
Tracy Marion IA In area quarries in marly members of Pella formations Mississippian Upper Pella typical Pella fossils IA0185
Le Grand Marshall IA Mississippian Blastoids,Crinoids IA0186
Le Grand Marshall IA 2 km N along Iowa River in massive fossiliferous blue siltstone ledges Devonian-Mississippian English River Brachiopods,pelecypods,pteropods,cephalopods IA0187
Le Grand Marshall IA 2 km N of IA30 in quarries Mississippian Hampton good,but uncommon crinoids IA0188
Le Grand Marshall IA In Mississippian Hampton (Kinderhook) Formation 2 km N in Le Grand quarries. Excellent crinoids but difficult to collect. Museum quality slabs. 41 species found. Apparently these are from specific individual beds uncovered in 1858,1874-1890,1931,1933, Mississippian Kinderhook Cactocrinus,Platycrinites,Rhodocrinites. IA0189
Le Grand Marshall IA In area Limestone quarries Mississippian crinoids,echinoderms Megistocrinus. IA0190
Le Grand Marshall IA in quarries 2 km N of IA30 Mississippian Hampton crinoids IA0191
LeGrand Marshall IA Mississippian Kinderhook fish teeth-Helodus IA0192
Marshalltown Marshall IA 14.5 km E in quarries described by Meek and Worthen nests of perfectly preserved crinoids. Worked out by mid 20th Century. IA0193
Stennett Montgomery IA 1 km up the ravine in creek bed Pennsylvanian Severy Shale abundant fossils. IA0194
Stennett Montgomery IA near mouth of ravine Pennsylvanian Severy Shale abundant fossils. IA0195
Moscow Muscatine IA Quarry on Cedar River. Corals -Cystiphyllum,Amplexus,Heterophrentis IA0196
Muscatine Muscatine IA Coelenterates – Eridophyllum,Halysites. Algae – Talonurus[?] IA0197 No citations for ‘Talonurus’ 050526
Muscatine Muscatine IA Pennsylvanian Plants Lepidophloios IA0198
Muscatine Muscatine IA In lower part of Mississippi River bluffs Mississippian Sweetland Creek poorly preserved Lingula. gastropods. Fish teeth in hard Green dolomitic shale -Spathiocaris,Selenocaris[?],Ptychodus,Rhynchodus,Synthetodus IA0199 No citations for ‘Selenocaris’ 050525
Wyoming Hill Muscatine IA 8-9.6km E of Muscatine in long RR cut near Hwy 22 plants Lepidophyllum,Lepidodendron,Annularia,Calamostachys,Alethopteris,Trigonocarpus IA0200
Norwich Page IA 4 km NE Pennsylvanian Upper Tarkio Phillipsia IA0201
Emmetsburg Palo Alto IA In stream gravels Petrified Wood IA0202
Graettinger Palo Alto IA In stream gravels Petrified Wood IA0203
Cherokee Plymouth IA N in gravel pit Pleistocene Elephas teeth and bones IA0204
LeMars Plymouth IA NE,in gravel pits Pleistocene water worn Elephant,deer,horse,etc. bones,teeth,horns. IA0205
Pierson Creek Valley Plymouth IA in pit to W Pleistocene Bison,elephants,horses,gastropods IA0206
Big Sioux River Plymouth? IA fossils take 1-29 north to the junction Cretaceous Greenhorn Fossils IA0207 The Big Sioux River is the boundary between Iowa and SD. Flows next to several counties. Plymouth Cy is a guess based on ref to I29
Gilmore City Pocahontas IA Mississippian Kinderhook Crinoids 24 species found. Museum quality specimens IA0208
Gilmore City Pocahontas IA 1 km NW in quarry brachiopods,crinoids,bryozoa IA0209
Gilmore City Pocahontas IA 2 km NW in Gilmore Portland Cement Co quarry corals,brachiopods IA0210
Gilmore City Pocahontas IA Fossiliferous Gray Limestone below. Fossiliferous white Kinderhook Limestone is found on quarry floors 1 km NW Mississippian Gilmore City brachiopods,bryozoa,crinoids,edrioasteroids in rare nests – Cribanocrinus,Rhodocrinites,Eretmocrinus,Aorocrinus,Dichocrinus,Platycrinus,Eutaxocrinus,Lasiocrinus,Goniocrinus,Paracosmetocrinus,Culmicrinus,Hypselocrinus,Gilmocrinus,Linocrinus IA0211
Des Moines Polk IA area exposures of shaley Limestone Pennsylvanian Cherokee trilobites – Griffithides IA0212
Des Moines Polk IA in area exposures Pennsylvanian Henrietta Griffithides IA0213
Grinnell Poweshiek IA E in abandoned quarry Mississippian vertebrates,brachiopods IA0214
Buffalo Scott IA Dewey Cement Co Quarry Devonian Cedar Valley Vertebrates-Gamphacanthus IA0215
Buffalo Scott IA E on Hwy22 in quarry Devonian Cedar Valley trilobites,crinoids,blastoids IA0216
Davenport Scott IA brachiopods Gypidula IA0217
Davenport Scott IA in area exposures Devonian Middle Davenport, Upper Proteus IA0218
Butlerville Tama IA In exposures along Iowa River Devonian-Mississippian English River diverse fossils IA0219
Indian Village Township Tama IA S8 Mississippian Kinderhook Chonetes,Productus,Rhynchonella,Spirifer,crinoid fragments,fish remains,Orthothetes,Spirifer,Straparollus IA0220
Indian Village Township Tama IA se1/4 s7 in E side of hill -Devils Anvil Zaphrentis,Chonetes,Productus,Orthothetes,Spirifer,Straparollus IA0221
Bentonsport Van Buren IA in area exposures Mississippian Keokuk typical fossils. IA0222
Ottumwa Wapello IA On Harrows Branch 400 meters upstream from 2nd Street corals,crinoid stems,bryozoa,brachiopods,pelecypods IA0223
Kalona Washington IA Devonian Maple Mill brachiopods Gluteus IA0224
Maple Mill Washington IA 2 km W at Wassonville Mill brachiopods,pelecypods,Dentalium,Bellerophon,gastropods,Orthoceras IA0225
Washington County Washington IA area exposures Brownish,dolomitic Limestones Devonian Maple Mill worm burrows,brachiopods,pelecypods,Scaphopods – Dentalium,Gastropods,Orthoceras,Phillipsia? IA0226
Wellman Washington IA in area exposures of Wassonville Member of Kinderhook Fm in white chert Mississippian Kinderhook Gastropods – 24 species. pelecypods – 9 species. Brachiopods – 35 species. Some specimens apparently with original shell coloring. IA0227
Fort Atkinson Winneshiek IA area Limestone exposures many fossils,Lindstroemella IA0228
Madison Township Winneshiek IA 1 km E of SE1/4 NW1/4 S19 Ordovician Elgin Isotelus IA0229
Madison Township Winneshiek IA SE1/4 NW1/4 S19 Ordovician Maquoketa Isotelus IA0230 Unable to confirm a Nordness Formation. It’s apparently a shale laying below the Maquoketa formation. The expected sequence in Winneshiek County is Dubuque member of the Galena formation capped by the Elgin member of the Maquoketa
Orleans Township Winneshiek IA SE1/4 S17 in road cuts on E,W road in highly fossiliferous Limestone trilobites,silicified graptolites IA0231
Ossian Winneshiek IA Ordovician Maquoketa Calymene IA0232
Ossian Winneshiek IA 1 km SW in area quarries Lindstroemella IA0233
Springfield Township Winneshiek IA road cuts along road from N end S23 to N end S24 Ordovician Maquoketa? brachiopods -Glyptorthis. IA0234
Sioux City Woodbury IA W part of City in Riverside area Cretaceous Dakota Inoceramus,fish scales,foraminifers. In underlying Sandstone – fish teeth and spines,Pelecypod casts,Turritella,Margarita,Cardium,Corbicula,Cyrene[?],Mactra,Protocardia,Trigonarca,leaf fragments,cones. IA0235 Cyrene is probably a misspelling of Cyrena synonym for Corbicula
– [?] IA Area exposures in East Iowa/West Illinois Mississippian Burlington Limestone Marine vertebrates-Cladodus,Ctenacanthus,Deltodus,Physonemus IA0237
Patterson Springs [?] IA Ordovician Maquoketa|Brainard trilobites – Calymene IA0236