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Rock Formation Name Index
of the Fossil Collection at the American Museum of Natural History

For a complete list of lithologic and geochronologic rock units,
see the GEOLEX: USGS National Geologic Map Database.
12901 localities
Abo4 localities
Admiral82 localities
Admiral ?19 localities
Admiral or Admiral-Belle Plain1 localities
Admiral?/Putnam1 localities
Admiral/Putnum1 localities
Aguja18 localities
Agula ?1 localities
Alachua Clay7 localities
Alachua Clays34 localities
Albany Limestone1 localities
Albert shales1 localities
Allegheny. Staunton)1 localities
Almond3 localities
Almy1 localities
ALPENA FM1 localities
Amyzon shale4 localities
Animas5 localities
Annona Chalk1 localities
Anzaldo1 localities
Aquia1 localities
Ardyn Obo16 localities
Areado1 localities
Arroyo246 localities
Arroyo ?27 localities
Arshanto4 localities
Arshanto?1 localities
Artinsk1 localities
Ash Hollow286 localities
Ash Hollow ?4 localities
Ash Hollow(basal)2 localities
Ash Hollow equivalent1 localities
Ash Hollow fm1 localities
Ash Hollow(lower)1 localities
Ash Hollow(middle)1 localities
Ash Hollow/Valentine1 localities
Aycross9 localities
Aycross ?2 localities
Aztec Siltstone4 localities
Barnwell3 localities
Baron Sog1 localities
Barstow74 localities
Barun Goyot1 localities
Barungoyt1 localities
basal Ash Hollow1 localities
Basal AshHollow3 localities
Basal Gering1 localities
Basal Hornerstown Fm.1 localities
Basal Ohio Shale1 localities
Bashi2 localities
Batesland2 localities
Batesland(?=marsland)1 localities
Bauru1 localities
Beartooth Butte2 localities
Beaufort series1 localities
Bedford Limestone1 localities
Bedford Shale1 localities
Beglia1 localities
Belen1 localities
BELL CANYON FM1 localities
Belle Plains171 localities
Belle Plains ?32 localities
Belle Plains fm3 localities
Belly River10 localities
Benton Sh1 localities
Benton Sh.1 localities
Benton shale1 localities
Benton Shale1 localities
Berea grit1 localities
Berea Shale1 localities
Berea Ss.1 localities
Bidahochi5 localities
Bidahouchi1 localities
Big Sandy126 localities
Big Sandy River1 localities
Birge (??Burge)1 localities
Bituminous shale1 localities
Blackband Ironstone1 localities
Black Creek2 localities
Black Creek/Peedee contact1 localities
Blackheath beds2 localities
Blackheath Beds1 localities
Black Shale1 localities
Black slate1 localities
Blanche Point1 localities
Blanco3 localities
Blufftown1 localities
Blufftown-Uppermost1 localities
BONE SPRING LS10 localities
Bone Springs10 localities
Bone Springs limestone1 localities
Bone Valley15 localities
Boonton Fm1 localities
Box Butte18 localities
Braumov1 localities
Bridger436 localities
Bridger ?5 localities
Bridger A10 localities
Bridger B55 localities
Bridger B116 localities
Bridger B2124 localities
Bridger B2-315 localities
Bridger B33 localities
Bridger B58 localities
Bridger C66 localities
Bridger C37 localities
Bridger C3, D45 localities
Bridger C55 localities
Bridger C-D6 localities
Bridger C-E4 localities
Bridger D23 localities
Bridger D14 localities
Bridger E2 localities
Bridger fm.1 localities
Bridger Fm1 localities
Bridger Fm.2 localities
Broumov1 localities
Brownstown Marl4 localities
Broxburn shale1 localities
Brule149 localities
Brule ?2 localities
BRULE 3 localities
Brule Fm.1 localities
Brunswick4 localities
Bull Run shale1 localities
Burge2 localities
Burge?1 localities
Burlington?1 localities
Burlington Limestone4 localities
Burlington or St.Louis Limesto1 localities
Buschwieler1 localities
Calciferous sandstone1 localities
Calciferous Sandstone4 localities
Calciferous Ss.2 localities
Calvert1 localities
Cambridge Greensands1 localities
Camp Rice2 localities
Cannel Below U. Freeport1 localities
Capetown1 localities
CapRock/Valen.1 localities
Carbondale1 localities
Carboniferous3 localities
Carboniferous Limestone1 localities
Carboniferous ls.2 localities
Cardiff Shale1 localities
Carl Creek Ls.2 localities
Carlile Shale1 localities
Carlin4 localities
Castle Hayne1 localities
Catskill11 localities
Cave sandstone1 localities
Cave Ss1 localities
Cave Ss ?2 localities
Cedar Mountain4 localities
Cedar Valley limestone1 localities
Cedar Valley Limestone1 localities
Cementstone Beds1 localities
Cerro de Pueblo Fm1 localities
Chadron100 localities
Chaffee1 localities
Chalk1 localities
Chamita34 localities
Chamita?1 localities
Chanares3 localities
Channel deposit(Runningwater)1 localities
Chemung7 localities
Chemung?1 localities
Chemung Sandstone4 localities
Chemung Ss.1 localities
Chester Granite1 localities
Chester Limestone2 localities
Chinle50 localities
Chinle ?4 localities
Chinle(Dolores)1 localities
Chinle(just below Navajo)1 localities
CHOCHAL LS13 localities
Chugwater1 localities
Cibao6 localities
Cibao ?1 localities
Claggett Shale2 localities
Clarendon19 localities
Clarendon beds9 localities
Cleveland Shale25 localities
Clevland Shale1 localities
Clinchfield sands1 localities
Cloghnan Shale1 localities
Cloverly41 localities
Cloverly ?2 localities
Clyde5 localities
Clyde ?6 localities
Coal Beds1 localities
Coal IV1 localities
Coal measures1 localities
Coal Measures26 localities
Coal Measures?1 localities
Coal Shale1 localities
Cockhead ironstone1 localities
Coconino2 localities
Coconino ?1 localities
Cody shale2 localities
Cody Shale1 localities
Coetas2 localities
Coffeeville1 localities
Colhue-Huapi6 localities
Colter6 localities
Columbus Limestone?1 localities
Columbus or Delaware Limestone2 localities
Conemaugh1 localities
Coney Shale1 localities
Continental intercalaire5 localities
Cooper Marl1 localities
Copper slate(Kupferschiefer)1 localities
Cornell Dam2 localities
(Corniferous limestone)1 localities
Corniferous limestone1 localities
Corrales1 localities
Cretaceous #21 localities
Cretaceous Chalk1 localities
Cuifengshan3 localities
Culm Shales2 localities
Cumnock8 localities
Curly Shale1 localities
Cutler10 localities
Cuyahoga1 localities
Cuyahoga gr.1 localities
Cuyahoga Shale2 localities
Dachschiefer1 localities
Dagger B1 localities
Dakota1 localities
De Beque3 localities
Deep mine ironstone1 localities
Deep Mine Ironstone1 localities
Deep River1 localities
Deep River?1 localities
Delaware limestone1 localities
Delaware Limestone1 localities
Delaware LImsetone1 localities
Delaware or Columbus Limestone2 localities
Delome or Wenlock1 localities
Deseado2 localities
Divisadero Largo1 localities
Djadochta43 localities
Dockum13 localities
Dockum ?2 localities
Dohoin Udu1 localities
Dohoin Usu5 localities
Dolomite lens in mid.Unit 41 localities
Douglass' White River
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localities
Dry Union1 localities
Duquesne Limestone 2A1 localities
Eagleford1 localities
Eagle Ford3 localities
Eagle Ford/Austin chalk1 localities
Early Early Snake Creek equiv.1 localities
Edmonton66 localities
Edwards Ls1 localities
Eisenknollen1 localities
El Gallo2 localities
El Molino1 localities
English Chalk1 localities
"Equus beds"""""2 localities
"Equus Beds"""""1 localities
Eric Shales1 localities
Escuminac10 localities
Escuminac beds1 localities
Estratos de Potrerillos1 localities
Estuary Clays1 localities
Etadunna4 localities
Eurinilla1 localities
Eutaw1 localities
Farasita1 localities
Fayum3 localities
FINIS SH1 localities
Fleming36 localities
Fleming ?1 localities
Flint Creek2 localities
Florissant Lake Beds1 localities
Foliated brown coal1 localities
Foremost1 localities
Fort Benton1 localities
Fort Benton ?2 localities
Fort Benton?1 localities
Fort Pierre ?2 localities
Fort Randall3 localities
Fort Union81 localities
Fort Union ?1 localities
Fox Creek1 localities
Fox Hill gr.2 localities
"Fox Hills"""""1 localities
Francis Creek shale2 localities
Freeport Coal11 localities
Fremouw41 localities
Fruitland4 localities
Ft. Benton6 localities
Ft. Pierre12 localities
Ft. Pierre black shale1 localities
Ft. Pierre Black Shale1 localities
Ft. Union21 localities
Gaber3 localities
Galisteo3 localities
Garber13 localities
Garber ?1 localities
Gashata2 localities
Gashato3 localities
Gaskable1 localities
Gaskohle3 localities
Gaskohle?1 localities
Gebel Qatroni1 localities
Genesee1 localities
Genesee Shale1 localities
Geneseo Shale1 localities
Genessee slate(above limestone1 localities
Gerber5 localities
Gerber?1 localities
Gering36 localities
Gering ?3 localities
Gila Congl.2 localities
GLENERIE FM1 localities
Glenns Ferry2 localities
Glenns Ferry?1 localities
Glen Rose2 localities
Gogo1 localities
Go-Go(Moythomasia?)1 localities
Golconda1 localities
Golden Valley1 localities
Gosau1 localities
Graneros Shale1 localities
Gray Bull2 localities
GrayBuol/Willwo1 localities
Grayling2 localities
Greenish brown & gra3 localities
Green marls2 localities
GreenRiver2 localities
Green River58 localities
Green River ?1 localities
Green River fm.1 localities
Green River Fm2 localities
Green River or Wasatch Fm.1 localities
Greensand27 localities
Greensand?3 localities
Greensand Beds1 localities
Greensand No. 51 localities
Green Sands1 localities
Grey Chalkstone1 localities
Griman Creek2 localities
Grumman cannel1 localities
Gurabo1 localities
Hamilton2 localities
Hamilton gr.2 localities
Harding shale1 localities
Harding ss.1 localities
Harrison66 localities
Harrison Fm4 localities
Harrison Fm.7 localities
Harrison/Marsla1 localities
Hartford Limestone1 localities
Hart Mine3 localities
Hawthorne4 localities
Hawthorne ?2 localities
"Hawthorne""Ashley R.Phosphate"""1 localities
Hell Creek194 localities
Hell Creek ?3 localities
Hell Creek fm6 localities
Hell Creen Fm1 localities
Hemphill3 localities
Hennessey Sh.2 localities
Henrietta1 localities
Hermit Sh1 localities
Hertha Ls.2 localities
Hoback4 localities
Holland Quarry Shale1 localities
Holt shale1 localities
Hornerstown9 localities
Hornerstown ?6 localities
Houldjin3 localities
Houldjin gravels1 localities
Hsanda Gol10 localities
HUECO LS1 localities
Huerfano106 localities
Humbold1 localities
Hung Kureh3 localities
Hunter Siltstone1 localities
Huron Shale5 localities
Ien Dabasu1 localities
Indian Meadows2 localities
Indian Springs Shale1 localities
Irati8 localities
Irden Manha1 localities
Irdin Manha30 localities
Iren Dabasu86 localities
Iren Dabasu1 localities
Iren Dabasu ?2 localities
IRen Dabasu1 localities
Iren Manha1 localities
Ischigualasto3 localities
Itapecuru1 localities
Jabel-el-Qatran2 localities
Jackson beds1 localities
Javelina1 localities
JEFFERSONVILLE FM1 localities
Jidith River1 localities
Joggins3 localities
John Day18 localities
Judith River64 localities
Judith River?1 localities
Jura Malm1 localities
Kaibab1 localities
KAIBAB LS2 localities
Karoo7 localities
Katipiri sands1 localities
Katipri Sands1 localities
Kayenta1 localities
Keim26 localities
Keiwitz Shale1 localities
Kelamayi1 localities
Kelm1 localities
Kelvin2 localities
Kem-Kem Beds. Tegana FM1 localities
KENDRICK SH1 localities
Keokuk group1 localities
Keokuk limestone3 localities
Keokuk Limestone11 localities
Keuper4 localities
Keyenta1 localities
Kholobochi1 localities
KHUNUK2 localities
Killdeer1 localities
Kiltorcan beds1 localities
Kimmeridge clay1 localities
Kimmeridge Clay1 localities
Kinderhook2 localities
KINNICK ?2 localities
Kirkland/Fruitl2 localities
Kirkland/OjoAla2 localities
Kirkland Shale1 localities
Kirkpatrick Basalt4 localities
Kishenehn1 localities
Kittanning Coal1 localities
Knight9 localities
Knocklofty Sandstone1 localities
Knowles Ironstone1 localities
Knowles Ironstone Shale1 localities
Knoydart1 localities
Kohlen1 localities
Kootenai4 localities
KupferSandstein1 localities
Kupferschiefer2 localities
Kupfesschiefer1 localities
Lackatong10 localities
Lagarcito1 localities
Lagunites1 localities
Lakota Ss1 localities
La Meseta1 localities
Lameta1 localities
Lance126 localities
Lance ?9 localities
Lance Creek24 localities
Lance Fm6 localities
Lance Fm.1 localities
Landisburg Ss (Bloomfield Ss)1 localities
Laramie4 localities
Lastro Oolitic Limestone1 localities
L. Brunswick1 localities
L.CoalMeasures1 localities
Lebo5 localities
Leda Clay?1 localities
Lettenkohle1 localities
Lexington coal1 localities
Lias9 localities
Lias ?1 localities
Lias (epsilon)1 localities
Liassic1 localities
Lignite Beds1 localities
limestone1 localities
Limestone.Oolite Indiana1 localities
Linton1 localities
Lithographic limestone1 localities
Lithographic Limestone6 localities
Lithographic sh2 localities
Livingston1 localities
L. Kirchberg1 localities
L. Lettenkohle1 localities
Lockatong22 localities
Lock Haven1 localities
Long Pine6 localities
Los Piedras1 localities
Loup Fork13 localities
Lower Admiral3 localities
Lower Bone Springs1 localities
Lower Bridger2 localities
Lower Bridger Fm.1 localities
Lower Carboniferous1 localities
Lower Carboniferous Limestone1 localities
Lower Chalk1 localities
Lower Coal Measures4 localities
Lower Green Malls1 localities
Lower Harrison2 localities
Lower Kapp Kjeldsen1 localities
Lower Lias1 localities
Lower Mesozoic Sandstone1 localities
Lower Old Red Sandstone1 localities
Lower Old Red Sandstone9 localities
Lower Old Red SAndstone1 localities
Lower Pierre shale1 localities
lower portion Glen Rose1 localities
Lower Round Mtn. Silt1 localities
Lower Saranac L.1 localities
Lower Siwaliks7 localities
Lower Snake Creek beds1 localities
Lower Snake Creek Beds1 localities
Lower Valentine1 localities
Lower Variegated Seq29 localities
L. Ripley2 localities
L. Snake Creek3 localities
Lt. Keuper1 localities
Lualaba Fm.1 localities
Lueders2 localities
Lugunites1 localities
Luohandong1 localities
Lutoe beds1 localities
L. Wasatch1 localities
Lw. Brule2 localities
Lw. Fremouw1 localities
Lw. Green Marls1 localities
Lw. Harrison1 localities
Lw.Headon beds1 localities
Lw. Huerfano1 localities
Lw. Keuper1 localities
Lw. Lias1 localities
Lw. Olcott6 localities
Lw. Pawnee Crk.2 localities
Lw. Ripley1 localities
Lw. Sakamena1 localities
Lw. Sheep Creek fm1 localities
Lw. Siwaliks3 localities
Lw. Siwalkis1 localities
Lw.SnakeCreek3 localities
Lw. Snake Creek35 localities
Lw.Snake Creek3 localities
Lw. Snake Crk.1 localities
Lw. Snalke Cree1 localities
Lw.Valentine2 localities
Lw. Valentine5 localities
Lw. Willwood1 localities
Mafra1 localities
Maizgordo ( Margas Verdes)1 localities
Maleri3 localities
Malm1 localities
Malm G22 localities
Malm Zeta 11 localities
Mancos Shale1 localities
Mandagary Sandstone1 localities
Manti1 localities
MARCELLUS FM1 localities
Marcellus Shale2 localities
Margas Multicolores (Margas Ve1 localities
Marias River Shale1 localities
Marias River Shale Fm.1 localities
Marius River Shale1 localities
Marl2 localities
marl beds1 localities
Marl beds1 localities
Marlbrook Marl2 localities
Marl slate?1 localities
Marsland58 localities
MARTIN BRIDGE FM2 localities
M. Ash Hollow2 localities
Mauch Chunk4 localities
Maxville Limestone1 localities
M. Bunter1 localities
M. Coal Measures2 localities
Mecca Quarry Shale1 localities
Mecca Shales1 localities
Mediterranstufe1 localities
Mendez7 localities
Mengyin1 localities
Merchantville2 localities
Mesaverde42 localities
Mesa Verde8 localities
Mesa Verde ?4 localities
Mesa Verde/Almon2 localities
Mesa Verde Fm.1 localities
Messel2 localities
Mid Coal Measures2 localities
Mid. Coal Measures1 localities
Middle Ash Hollow1 localities
Middle Coal Measures1 localities
Middle Old Red Sandstone22 localities
Middle Sakamena1 localities
Middle Valentine1 localities
Mid. Mabumbisa1 localities
Mid Old Red Sandstone1 localities
Mid. Siwaliks4 localities
Mid. Uina1 localities
Milk Creek14 localities
Milwaukee limestone1 localities
Minturn1 localities
Missao Velha1 localities
Modelo2 localities
Moenave ?3 localities
Moenkopi13 localities
MOHO FM1 localities
Monroe Creek28 localities
Monroe Creek ?3 localities
Monte Bastellaro Series1 localities
Moran6 localities
Morison9 localities
Morrison314 localities
Morrison ?3 localities
Morrow Creek3 localities
Mowry Shale3 localities
Mowry Shale ?1 localities
Mt. Eden2 localities
Mt Laurel ?1 localities
Mt. Laurel1 localities
Mt. Laurel Sands1 localities
Muddy Creek1 localities
MURAILLES FM1 localities
Muschelkalk6 localities
Mytilini7 localities
Nacatosh Sandstone3 localities
Nacatosh Sandstone?1 localities
Nacemiento2 localities
Nacimento8 localities
Nacimiento75 localities
Nacimiento ?11 localities
Nagri ?1 localities
Namba44 localities
Narabeen Shales1 localities
Navarro1 localities
Navesink7 localities
Navesink ?1 localities
Navesink?/Horne1 localities
NEEDMORE FM1 localities
Needmore Shale1 localities
Nemegt1 localities
Neuguen1 localities
New Albany Shale2 localities
New Egypt1 localities
New Fork2 localities
New Haven1 localities
New Oxford9 localities
New Providence1 localities
Newsham Collicry1 localities
Neylandville1 localities
Niobrara241 localities
Niobrara ?13 localities
Niobrara/Pier1 localities
No. 2 Loanhead ironstone1 localities
North Horn2 localities
North Staffordshire Coal Field1 localities
Oakville7 localities
Oakville ?1 localities
Oakville fm1 localities
Ogallala28 localities
Oil Shale1 localities
Ojo Alamo1 localities
Olcott176 localities
Olcott ?6 localities
Olcott fm.7 localities
Oldman1 localities
Old Man111 localities
Old Man ?2 localities
Old Red Sandstone11 localities
Olean cgl.1 localities
Omingonde ?1 localities
Onaga1 localities
Ondai Sair10 localities
Ondai Sair?1 localities
Ondai Sair paper-shales1 localities
On Gong2 localities
Onondaga3 localities
Onondaga limestone1 localities
Oolites1 localities
Oologah1 localities
Orella9 localities
Osborne beds1 localities
Oshih23 localities
Otway1 localities
Oxford Clay5 localities
Palm Springs1 localities
Pampean1 localities
Panaca23 localities
Panchet1 localities
Park City1 localities
PARK CITY FM8 localities
Parrsboro2 localities
Paskapoo2 localities
Passage Beds1 localities
Patagonian7 localities
Pawnee Creek37 localities
Paw Paw1 localities
Pekin25 localities
Peluxy1 localities
Pennsylvanian3 localities
Phosphate beds3 localities
Phosphorites7 localities
Pierre7 localities
Pierre?1 localities
Pierre fm.1 localities
Pierre shale2 localities
Pierre Shale17 localities
Pierre Shale ?5 localities
Pinyon Cong.1 localities
Pirgua1 localities
Pittsburgh Ls1 localities
Plachua Clay1 localities
"Plattenkalk"""""1 localities
Point Edward2 localities
Polecat Bench10 localities
Polecat Bench?1 localities
Pomquet1 localities
Pondaug6 localities
Pondaung5 localities
Pondaung Clays1 localities
Pondaung Fm.2 localities
Popo Agie2 localities
Portage2 localities
Portishead beds1 localities
Portland1 localities
Posidonienschie1 localities
Puerco29 localities
Puerco?4 localities
Pumpherston shale1 localities
Pungo River1 localities
Pungo River ?1 localities
Pungo River marl1 localities
Pungo River (marl)1 localities
Pungo River Marl1 localities
Purbeck1 localities
Putnam7 localities
Putnam ?2 localities
Putnam/Admiral1 localities
Putnum6 localities
Putnum ?1 localities
Qasr-el-Sagha2 localities
Qasr-el-Sagha?1 localities
Qasr-el-Sagha bed1 localities
Qsar el Sagha2 localities
Querecual Ls1 localities
Quibiris15 localities
Quiburis1 localities
Rag mine ironstone1 localities
Ralston1 localities
Rattlesnake2 localities
Ravenscrag1 localities
Red Bank/Horners1 localities
Redbank Plains1 localities
Redbank Plains Pl.1 localities
Red Beds2 localities
"Red Crag"""""1 localities
Renova9 localities
Rhaetic3 localities
Rhinestreet Shale1 localities
Ricardo2 localities
Richmond Basin3 localities
Rierdon?1 localities
Ringold4 localities
Rio Colorado1 localities
ROAD CANYON FM1 localities
Roca?1 localities
Rock Bench1 localities
RONCELLES FM1 localities
Rosebud2 localities
Rothliegende1 localities
Rothliegendes1 localities
Rotliegende1 localities
Rotliegendes1 localities
Rotliegendes(Red beds)1 localities
Runningwater126 localities
Runningwater ?6 localities
Runningwater fm.1 localities
Saangra do Cabral1 localities
Salamanca4 localities
Salem Limestone4 localities
SAN ANDRES FM2 localities
Sand Canyon23 localities
San Felipe1 localities
Sanga do Cabral1 localities
Sangra do Cabral2 localities
San Jose118 localities
San Jose(reworked)1 localities
San Sebastian3 localities
Santa Barabara1 localities
Santa Barbara5 localities
Santa Crus2 localities
Santa Cruz11 localities
Santa Fe5 localities
Santa Maria9 localities
Santana26 localities
Santana ?1 localities
SANTA ROSA FM1 localities
Sao Khua1 localities
Schoharie1 localities
Schoharie grit1 localities
Scollard2 localities
Scot. Coal Fields1 localities
Second Mtn. Ss.1 localities
Selma1 localities
Seminole1 localities
Sene Baia1 localities
Sespe7 localities
SEVEN DEVILS FM1 localities
Shara Marun1 localities
Shara Marun?1 localities
Shara Murun15 localities
Shara Murun?1 localities
Shark River marl1 localities
Sharps3 localities
"Sheep Creek"""""1 localities
Sheep Creek195 localities
Sheep Creek?3 localities
Sheep Creek Channel Beds1 localities
Sheep Pass1 localities
Shuttle Meadow4 localities
Siebert Tuff1 localities
Silver Lake2 localities
Sinbad1 localities
Siwalik133 localities
Snake Creek73 localities
Snake Creek ?2 localities
Snake Creek beds1 localities
Snake Creek ?Lower1 localities
Solenhofen1 localities
Solenhofen Limestone1 localities
Solenhofn1 localities
Solnhofener Plattenkalke2 localities
Solnhofen limestone3 localities
Solnhofen Limestone1 localities
Solnhofen Plattenkalk2 localities
Spirifer Yassensis Limestone1 localities
Split Rock1 localities
Spoon/Abbott1 localities
Spray River1 localities
Stairway Set1 localities
Stanton2 localities
Stark shale3 localities
Starks shales1 localities
Star Peak1 localities
State Quarry limestone1 localities
St. David23 localities
St. Louis Limestone6 localities
St. Mary6 localities
Stockton5 localities
Stubersandstein4 localities
Sulpher Mountain1 localities
Sulphur Mnt.2 localities
Sulphur Mountain3 localities
Sulticollo2 localities
Sundance6 localities
Supai2 localities
Sykes Mtn/Dakota1 localities
Talbragar Beds1 localities
Taylor1 localities
Tecovas3 localities
Tegana1 localities
Telgate Grit1 localities
Tepee Trail11 localities
Tepee Trail ?2 localities
Tesuque124 localities
Tesuque ?2 localities
Thaynes3 localities
THAYNES FM1 localities
Thin Elk Gravels2 localities
Thousand Creek2 localities
Tiffany5 localities
Timber Creek Ls1 localities
Toad-Grayling1 localities
Todilto1 localities
Todilto limestone2 localities
Todilto ls.2 localities
Tongue River2 localities
Toolbuc Ls1 localities
Torrejon25 localities
Torrejon/Puerco1 localities
Tranquille1 localities
Transitional beds1 localities
Tremembe1 localities
Trent marl2 localities
Trinity ss2 localities
Trochiten chalk1 localities
Tsagan Nor4 localities
TSAGAN NURU2 localities
Tukhum2 localities
Tulock4 localities
Tung Gur24 localities
Tung Gur Fm.1 localities
Turkey Branch1 localities
Turloch1 localities
Turner Falls2 localities
Turners Falls Sandstone1 localities
TurnersFalls Ss5 localities
"Turritella Beds"""""1 localities
Turtle Butte3 localities
Tuscahoma1 localities
Tuscumbia Limestone1 localities
Two Medicene14 localities
Two Medicine23 localities
U.BoneValley3 localities
U. Bone Valley3 localities
U.Chadron1 localities
U. Fleming3 localities
U. Freeport Coal Beds1 localities
U.Gabor3 localities
U. Gabor2 localities
Uinta16 localities
UINTA1 localities
Uitenhage1 localities
U. Judith River1 localities
U. Keuoer1 localities
U. Keuper7 localities
U. Kirkland1 localities
U.Kittanning Co1 localities
Ulan Gochu14 localities
Ulan Shireh13 localities
U. Monroe Creek1 localities
U. Nacimento1 localities
U. Nemegt1 localities
Unt. Rotliegends3 localities
U. Olcott1 localities
Up. Fleming2 localities
UpFreeportCoal2 localities
Up.FreeportCoal1 localities
Up. Gabor2 localities
Up Helderberg2 localities
Up Marsland(=Runningwater fm)3 localities
Up. Olcott7 localities
Upper Admiral or Belle Plains1 localities
Upper Ash Hollow1 localities
Upper Beaufort3 localities
Upper Bridger1 localities
Upper Bridger Fm.1 localities
Upper Carboniferous Limestone?1 localities
Upper Chinle7 localities
Upper Dockum1 localities
Upper Ecca1 localities
Upper Freeport Coal1 localities
"Upper Helderberg"""""1 localities
Upper Helderberg limestone1 localities
Upper Lettenkohle1 localities
Upper Lias4 localities
Upper Magnesian Limestone1 localities
Upper Old Red Sandstone4 localities
Upper Old Red Ss.;Nairn Ss.1 localities
Upper Santana?3 localities
Upper Valentine1 localities
Up.Puerco2 localities
Up.Runningwater2 localities
Up. Sheep Creek1 localities
Up. Valentine1 localities
Urumaco1 localities
U. Runningwater1 localities
U. Snake Creek3 localities
U. Valentine1 localities
U. Wasatch2 localities
Vaca Muerta1 localities
Valentine334 localities
Valentine ?1 localities
Velasco11 localities
vieja1 localities
Vieja3 localities
Virgin Limestone1 localities
Wagonbed1 localities
Waite2 localities
Wall Creek Ss.1 localities
Wanakah2 localities
Wan Chuan4 localities
Warsaw beds1 localities
Warsaw Limestone2 localities
Wasatch201 localities
Wasatch ?3 localities
Wasatch?1 localities
Wasatch fm1 localities
Wasatch Fm.1 localities
Washakie36 localities
Water Canyon7 localities
Waverly9 localities
Waverly?(Waverly not in Iowa)1 localities
Wealden2 localities
Wealden Clay2 localities
Wealden marls1 localities
Wealdon1 localities
Wea shales1 localities
Wea Shales1 localities
Weisser Jura1 localities
Wemakah1 localities
Wenonah1 localities
Wenonah-Mt.Laurel and Navesink1 localities
Wenonah Sand1 localities
Weylan Cannel1 localities
White River94 localities
Whiter River7 localities
Whitney5 localities
Wiggins4 localities
Willwood201 localities
Willwood ?3 localities
WindRiver3 localities
Wind River130 localities
Wipijiri1 localities
Wolfville ss7 localities
Woodbury1 localities
Woolwich beds1 localities
Word fm. #41 localities
Wyandotte1 localities
Yazoo Clay1 localities
Yegua2 localities
Yerrapalli1 localities
Yoder2 localities
Yoder ?1 localities
Yorktown1 localities
Zia Sand14 localities
Zone 51 localities
Zorzino Ls.1 localities
12901 localities