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GSA Bulletin (593)
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Journal of Paleontology (331)
American Mineralogist (306)
Geology (199)
Canadian Journal of Earth Sciences (184)
Economic Geology (155)
Journal of Sedimentary Research (151)
The Canadian Mineralogist (67)
Bulletin of the Seismological Society of America (53)
PALAIOS (48)
Seismological Research Letters (48)
Environmental & Engineering Geoscience (38)
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Geosphere (28)
The Journal of Geology (25)
Earth Sciences History (20)
Paleobiology (19)
Environmental Geosciences (18)
Clays and Clay Minerals (16)
The Leading Edge (16)
Geological Magazine (14)
Vadose Zone Journal (13)
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Elements (6)
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- Paleozoic
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  - Carboniferous
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      - Lower Mississippian
        
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        Fort Payne Formation (1)
        
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        Meramecian
        
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    - Pennsylvanian
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      - Lower Pennsylvanian
        
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        Desmoinesian
        
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      - Upper Pennsylvanian
        
        Ames Limestone (1)
        
        Glenshaw Formation (3)
        
        Missourian
        
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  - Catskill Formation (22)
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      - Littleton Formation (3)
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      - Manlius Formation (14)
      - Oriskany Sandstone (35)
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    - Middle Devonian
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      - Eifelian (11)
      - Givetian (18)
      - Hamilton Group (67)
      - Ludlowville Formation (18)
      - Mahantango Formation (9)
      - Marcellus Shale (58)
      - Moscow Formation (22)
      - Onondaga Limestone (36)
      - Tioga Bentonite (3)
      - Tully Limestone (17)
    - Miette Complex (1)
    - Millboro Shale (2)
    - Old Red Sandstone (3)
    - Traverse Group (1)
    - Upper Devonian
      - Brallier Shale (5)
      - Canadaway Group (5)
      - Chemung Formation (7)
      - Cleveland Member (1)
      - Famennian
        
        lower Famennian (1)
        
        upper Famennian (2)
      - Frasnian
        
        upper Frasnian (2)
      - Huron Member (2)
      - Kellwasser event (5)
      - Ohio Shale (3)
      - Sonyea Group (7)
      - West Falls Formation (3)
  - Dunkard Group (3)
  - Hartland Formation (4)
  - Helderberg Group (20)
  - Keyser Limestone (3)
  - Knox Group (1)
  - lower Paleozoic
    - Cape Phillips Formation (2)
    - Conococheague Formation (2)
    - Glenarm Series (1)
    - Rose Run Sandstone (1)
    - Wilmington Complex (4)
  - Manhattan Formation (5)
  - middle Paleozoic (2)
  - New Albany Shale (2)
  - Ordovician
    - Catoche Formation (1)
    - Gull River Formation (4)
    - Lower Ordovician
      - Arenigian (2)
      - Beekmantown Group (12)
      - El Paso Group (1)
      - Ellenburger Group (1)
      - Epler Formation (1)
      - Ibexian (2)
      - Tremadocian (8)
    - Martinsburg Formation (18)
    - Meguma Group (1)
    - Middle Ordovician
      - Ammonoosuc Volcanics (8)
      - Black River Group (7)
      - Blackriverian (4)
      - Bromide Formation (2)
      - Champlainian (3)
      - Chazy Group (6)
      - Chazyan (4)
      - Cloridorme Formation (2)
      - Darriwilian (2)
      - Deicke Bentonite Bed (1)
      - Dolgeville Formation (6)
      - Millbrig Bentonite Bed (2)
      - Normanskill Formation (6)
      - Partridge Formation (2)
      - Schenectady Formation (2)
      - Shadow Lake Formation (1)
    - Trenton Group (35)
    - Upper Ordovician
      - Ashgillian (2)
      - Caradocian (6)
      - Cincinnatian
        
        Richmondian (2)
      - Cortlandt Complex (5)
      - Edenian (1)
      - Hirnantian (3)
      - Juniata Formation (9)
      - Katian (12)
      - Lorraine Group (2)
      - Maquoketa Formation (1)
      - Mohawkian (1)
      - Neda Formation (1)
      - Queenston Shale (7)
      - Reedsville Formation (2)
      - Sandbian (2)
      - Trentonian (32)
    - Utica Shale (18)
    - Viola Limestone (1)
  - Permian
    - Lower Permian (1)
    - Middle Permian (1)
    - Phosphoria Formation (1)
    - Stone Corral Formation (1)
    - Upper Permian (2)
  - Rangeley Formation (2)
  - Rondout Formation (3)
  - Sauk Sequence (2)
  - Shawangunk Formation (5)
  - Silurian
    - Lockport Formation (22)
    - Lower Silurian
      - Grimsby Sandstone (6)
      - Llandovery
        
        Aeronian (2)
        
        Rhuddanian