Washington County, Maryland, USAi

Regional Level Types
Washington County	County
Maryland	State
USA	Country

This county in western Maryland is underlain by sedimentary rocks that have been spectacularly folded and faulted by the late Paleozoic Allegheny orogeny (mountain building period). These folded rocks are beautifully displayed at the I-70 road cut at Sideling Hill. Differential erosion has sculpted these rocks into alternating high and low lands known as the scenic "Valley and Ridge Province" of the Appalachians. The rocks are generally unmineralized, little metamorphosed sandstone, shales, limestones and coal beds ranging in age from Ordovician to Pennsylvanian. They are at times profusely fossiliferous. Many of these lithologies are well exposed in road cuts, most notably the magnificent syncline exposed in the Sideling Hill road cut on I-68. Cambrian limestone abounds in the Hagerstown Valley, an extension of the Great Valley. On the eastern side of this valley, forming the eastern edge of the County, is the Blue Ridge Province, where older, more metamorphosed sedimentary rocks and volcanic rocks of Proterozoic to Cambrian age occur. These are well exposed in Greenbrier and Washington Monument State Parks on South Mountain, which is held up by the very resistant Cambrian Wevertown Quartzite. Some of the volcanic rocks host small native copper deposits.

Fossils

There are 15 fossil localities from the PaleoBioDB database within this region.

BETA TEST - These data are provided on an experimental basis and are taken from external databases. Mindat.org has no control currently over the accuracy of these data.

Occurrences	258
Youngest Fossil Listed	0.01 Ma (Pleistocene)
Oldest Fossil Listed	485 Ma (Early/Lower Ordovician)
Stratigraphic Units	Click here to view 19 stratigraphic units.
Stratigraphic Units	Unit No. Occurrences Age Jennings - Parkhead 1 382.7 - 372.2 Ma (Late/Upper Devonian) Jennings - Woodmont 2 382.7 - 372.2 Ma (Late/Upper Devonian) Romney - Hamilton 1 387.7 - 382.7 Ma (Devonian) Marcellus 6 387.7 - 358.9 Ma (Devonian) Keyser Limestone 85 419.2 - 393.3 Ma (Early/Lower Devonian) Williamsport Sandstone - Bloomsburg facies 2 425.6 - 423 Ma (Silurian) Wills Creek Limestone 23 427.4 - 419.2 Ma (Paleozoic) Mifflintown - Keefer 2 433.4 - 427.4 Ma (Silurian) Clinton - Rose Hill 20 438.5 - 423 Ma (Silurian) Clinton - Keefer Sandstone 6 443.4 - 423 Ma (Silurian) Chambersburg 1 460.9 - 449.5 Ma (Ordovician) Chambersburg - Pinesburg 1 460.9 - 449.5 Ma (Ordovician) New Market 1 468.1 - 460.9 Ma (Middle Ordovician) Newmarket 1 468.1 - 460.9 Ma (Middle Ordovician) Row Park Limestone - Maclurites Bed 1 471.8 - 457.5 Ma (Ordovician) Rockdale Run 24 478.6 - 468.1 Ma (Ordovician) Chepultepec 6 485.4 - 477.7 Ma (Paleozoic) Rockdale Run - lower 17 485.4 - 468.1 Ma (Paleozoic) Stonehenge Limestone 12 485.4 - 468.1 Ma (Paleozoic)
Fossils from Region	Click here to show the list.
Accepted Name Hierarchy Age Archaeoscyphia genus Animalia : Porifera : Anthaspidellidae : Archaeoscyphia 485.4 - 468.1 Ma Paleozoic Stromatoporoidea class Animalia : Porifera : Stromatoporoidea 419.2 - 393.3 Ma Early/Lower Devonian Lichenaria genus Animalia : Cnidaria : Anthozoa : Lichenariidae : Lichenaria 485.4 - 468.1 Ma Paleozoic Rugosa subclass Animalia : Cnidaria : Anthozoa : Rugosa 419.2 - 393.3 Ma Early/Lower Devonian Cyathophyllum genus Animalia : Cnidaria : Anthozoa : Cyathophyllidae : Cyathophyllum 427.4 - 419.2 Ma Paleozoic Ribeiria genus Animalia : Mollusca : Rostroconchia : Ribeirioida : Technophoridae : Ribeiria 485.4 - 468.1 Ma Paleozoic Tentaculitida order Animalia : Lophotrochozoa : Tentaculitida 419.2 - 393.3 Ma Early/Lower Devonian Tentaculites genus Animalia : Mollusca : Tentaculitidae : Tentaculites 419.2 - 393.3 Ma Early/Lower Devonian Euomphalina order Animalia : Mollusca : Gastropoda : Euomphalina 393.3 - 387.7 Ma Devonian Ceratopea genus Animalia : Mollusca : Gastropoda : Raphistomatidae : Ceratopea 485.4 - 468.1 Ma Paleozoic Ecculiomphalus genus Animalia : Mollusca : Gastropoda : Euomphalidae : Ecculiomphalus 485.4 - 468.1 Ma Paleozoic Lesueurilla genus Animalia : Mollusca : Gastropoda : Lesueurillidae : Lesueurilla 485.4 - 468.1 Ma Paleozoic Ophileta genus Animalia : Mollusca : Gastropoda : Raphistomatidae : Ophileta 485.4 - 468.1 Ma Paleozoic Orospira genus Animalia : Mollusca : Gastropoda : Raphistomatidae : Orospira 485.4 - 468.1 Ma Paleozoic Archaeogastropoda order Animalia : Mollusca : Gastropoda : Archaeogastropoda 419.2 - 393.3 Ma Early/Lower Devonian Dakeoceras genus Animalia : Mollusca : Cephalopoda : Ellesmeroceratidae : Dakeoceras 485.4 - 468.1 Ma Paleozoic Ellesmeroceras genus Animalia : Mollusca : Cephalopoda : Ellesmeroceratidae : Ellesmeroceras 485.4 - 468.1 Ma Paleozoic Oneotoceras genus Animalia : Mollusca : Cephalopoda : Ellesmeroceratidae : Oneotoceras 485.4 - 477.7 Ma Paleozoic Rioceras genus Animalia : Mollusca : Cephalopoda : Baltoceratidae : Rioceras 485.4 - 468.1 Ma Paleozoic Clitendoceras genus Animalia : Mollusca : Cephalopoda : Proterocameroceratidae : Clitendoceras 485.4 - 468.1 Ma Paleozoic Coreanoceras genus Animalia : Mollusca : Cephalopoda : Manchuroceratidae : Coreanoceras 485.4 - 468.1 Ma Paleozoic Escharendoceras genus Animalia : Mollusca : Cephalopoda : Proterocameroceratidae : Escharendoceras 485.4 - 468.1 Ma Paleozoic Lobosiphon genus Animalia : Mollusca : Cephalopoda : Proterocameroceratidae : Lobosiphon 485.4 - 468.1 Ma Paleozoic Mcqueenoceras genus Animalia : Mollusca : Cephalopoda : Proterocameroceratidae : Mcqueenoceras 485.4 - 468.1 Ma Paleozoic Mysticoceras genus Animalia : Mollusca : Cephalopoda : Proterocameroceratidae : Mysticoceras 485.4 - 468.1 Ma Paleozoic Phragmosiphon genus Animalia : Mollusca : Cephalopoda : Proterocameroceratidae : Phragmosiphon 485.4 - 468.1 Ma Paleozoic Platysiphon genus Animalia : Mollusca : Cephalopoda : Proterocameroceratidae : Platysiphon 485.4 - 468.1 Ma Paleozoic Pliendoceras genus Animalia : Mollusca : Cephalopoda : Proterocameroceratidae : Pliendoceras 485.4 - 468.1 Ma Paleozoic Proterocameroceras genus Animalia : Mollusca : Cephalopoda : Proterocameroceratidae : Proterocameroceras 485.4 - 468.1 Ma Paleozoic Retroclitendoceras genus Animalia : Mollusca : Cephalopoda : Proterocameroceratidae : Retroclitendoceras 485.4 - 468.1 Ma Paleozoic Stenosiphon genus Animalia : Mollusca : Cephalopoda : Proterocameroceratidae : Stenosiphon 485.4 - 468.1 Ma Paleozoic Nuculoidea genus Animalia : Mollusca : Bivalvia : Nuculida : Nuculidae : Nuculoidea 387.7 - 382.7 Ma Devonian Palaeoneilo genus Animalia : Mollusca : Bivalvia : Nuculanida : Malletiidae : Palaeoneilo 382.7 - 372.2 Ma Late/Upper Devonian Actinopteria genus Animalia : Mollusca : Bivalvia : Ostreida : Pterineidae : Actinopteria 382.7 - 372.2 Ma Late/Upper Devonian Pterinea genus Animalia : Mollusca : Bivalvia : Ostreida : Pterineidae : Pterinea 443.4 - 423 Ma Silurian Erettopterus genus Animalia : Arthropoda : Xiphosura : Eurypterida : Erettopterus 433.4 - 427.4 Ma Silurian Pterygotus genus Animalia : Arthropoda : Xiphosura : Eurypterida : Pterygotidae : Pterygotus 433.4 - 427.4 Ma Silurian Trilobita class Animalia : Arthropoda : Trilobita 419.2 - 393.3 Ma Early/Lower Devonian Bellefontia genus Animalia : Arthropoda : Trilobita : Asaphida : Asaphidae : Bellefontia 485.4 - 468.1 Ma Paleozoic Hystricurus genus Animalia : Arthropoda : Trilobita : Aulacopleurida : Hystricuridae : Hystricurus 485.4 - 468.1 Ma Paleozoic Psalikilus genus Animalia : Arthropoda : Trilobita : Aulacopleurida : Hystricuridae : Psalikilus 485.4 - 468.1 Ma Paleozoic Phacopida order Animalia : Arthropoda : Trilobita : Phacopida 393.3 - 387.7 Ma Devonian Calymene genus Animalia : Arthropoda : Trilobita : Phacopida : Calymenidae : Calymene 443.4 - 419.2 Ma Paleozoic Dalmanites genus Animalia : Arthropoda : Trilobita : Phacopida : Dalmanitidae : Dalmanites 438.5 - 433.4 Ma Silurian Liocalymene genus Animalia : Arthropoda : Trilobita : Phacopida : Bathycheilidae : Liocalymene 443.4 - 423 Ma Silurian Trimerus genus Animalia : Arthropoda : Trilobita : Phacopida : Homalonotidae : Trimerus 443.4 - 423 Ma Silurian Ostracoda class Animalia : Arthropoda : Ostracoda 419.2 - 387.7 Ma Devonian Leperditia genus Animalia : Arthropoda : Ostracoda : Leperditiidae : Leperditia 427.4 - 393.3 Ma Paleozoic Beyrichia genus Animalia : Arthropoda : Ostracoda : Palaeocopida : Beyrichiidae : Beyrichia 438.5 - 433.4 Ma Silurian Bonnemaia genus Animalia : Arthropoda : Ostracoda : Palaeocopida : Zygobolbidae : Bonnemaia 443.4 - 423 Ma Silurian Kloedenia genus Animalia : Arthropoda : Ostracoda : Kloedeniidae : Kloedenia 427.4 - 419.2 Ma Paleozoic Bryozoa phylum Animalia : Bryozoa 427.4 - 393.3 Ma Paleozoic Fenestrata order Animalia : Bryozoa : Stenolaemata : Fenestrata 419.2 - 393.3 Ma Early/Lower Devonian Brachiopoda phylum Animalia : Brachiopoda 393.3 - 387.7 Ma Devonian Lingula genus Animalia : Brachiopoda : Lingulata : Lingulida : Lingulidae : Lingula 425.6 - 423 Ma Silurian Obolus genus Animalia : Brachiopoda : Lingulata : Lingulida : Obolidae : Obolus 485.4 - 468.1 Ma Paleozoic Dalejina genus Animalia : Brachiopoda : Rhynchonellata : Orthida : Rhipidomellidae : Dalejina 419.2 - 393.3 Ma Early/Lower Devonian Diparelasma genus Animalia : Brachiopoda : Rhynchonellata : Orthida : Finkelnburgiidae : Diparelasma 485.4 - 468.1 Ma Paleozoic Dolerorthis genus Animalia : Brachiopoda : Rhynchonellata : Orthida : Hesperorthidae : Dolerorthis 419.2 - 393.3 Ma Early/Lower Devonian Finkelnburgia genus Animalia : Brachiopoda : Rhynchonellata : Orthida : Finkelnburgiidae : Finkelnburgia 485.4 - 468.1 Ma Paleozoic Isorthis genus Animalia : Brachiopoda : Rhynchonellata : Orthida : Dalmanellidae : Isorthis 419.2 - 393.3 Ma Early/Lower Devonian Levenea genus Animalia : Brachiopoda : Rhynchonellata : Orthida : Dalmanellidae : Levenea 393.3 - 387.7 Ma Devonian Polytoechia genus Animalia : Brachiopoda : Strophomenata : Billingsellida : Polytoechiidae : Polytoechia 485.4 - 468.1 Ma Paleozoic Resserella genus Animalia : Brachiopoda : Rhynchonellata : Orthida : Dalmanellidae : Resserella 443.4 - 423 Ma Silurian Rhipidomella genus Animalia : Brachiopoda : Rhynchonellata : Orthida : Rhipidomellidae : Rhipidomella 443.4 - 387.7 Ma Paleozoic Tritoechia genus Animalia : Brachiopoda : Strophomenata : Billingsellida : Polytoechiidae : Tritoechia 485.4 - 468.1 Ma Paleozoic Chonetes genus Animalia : Brachiopoda : Strophomenata : Productida : Chonetidae : Chonetes 438.5 - 387.7 Ma Paleozoic Chonostrophia genus Animalia : Brachiopoda : Strophomenata : Productida : Chonostrophiidae : Chonostrophia 393.3 - 387.7 Ma Devonian Eccentricosta genus Animalia : Brachiopoda : Strophomenata : Productida : Strophochonetidae : Eccentricosta 419.2 - 393.3 Ma Early/Lower Devonian Leptaena genus Animalia : Brachiopoda : Strophomenata : Strophomenida : Rafinesquinidae : Leptaena 438.5 - 393.3 Ma Paleozoic Leptostrophia genus Animalia : Brachiopoda : Strophomenata : Strophomenida : Leptostrophiidae : Leptostrophia 443.4 - 393.3 Ma Paleozoic Longispina genus Animalia : Brachiopoda : Strophomenata : Productida : Chonetidae : Longispina 393.3 - 387.7 Ma Devonian Pholidostrophia genus Animalia : Brachiopoda : Strophomenata : Strophomenida : Strophodontidae : Pholidostrophia 393.3 - 387.7 Ma Devonian Protodouvillina genus Animalia : Brachiopoda : Strophomenata : Strophomenida : Douvillinidae : Protodouvillina 393.3 - 387.7 Ma Devonian Rafinesquina genus Animalia : Brachiopoda : Strophomenata : Strophomenida : Rafinesquinidae : Rafinesquina 438.5 - 433.4 Ma Silurian Schuchertella genus Animalia : Brachiopoda : Strophomenata : Orthotetida : Schuchertellidae : Schuchertella 419.2 - 387.7 Ma Devonian Strophonella genus Animalia : Brachiopoda : Strophomenata : Strophomenida : Strophonellidae : Strophonella 419.2 - 393.3 Ma Early/Lower Devonian Truncalosia genus Animalia : Brachiopoda : Strophomenata : Productida : Araksalosiidae : Truncalosia 393.3 - 387.7 Ma Devonian Diaphelasma genus Animalia : Brachiopoda : Rhynchonellata : Pentamerida : Clarkellidae : Diaphelasma 485.4 - 468.1 Ma Paleozoic Doloresella genus Animalia : Brachiopoda : Rhynchonellata : Pentamerida : Tetralobulidae : Doloresella 485.4 - 468.1 Ma Paleozoic Gypidula genus Animalia : Brachiopoda : Rhynchonellata : Pentamerida : Gypidulidae : Gypidula 419.2 - 393.3 Ma Early/Lower Devonian Stichotrophia genus Animalia : Brachiopoda : Rhynchonellata : Pentamerida : Clarkellidae : Stichotrophia 485.4 - 468.1 Ma Paleozoic Syntrophinella genus Animalia : Brachiopoda : Rhynchonellata : Pentamerida : Clarkellidae : Syntrophinella 485.4 - 468.1 Ma Paleozoic Tetralobula genus Animalia : Brachiopoda : Rhynchonellata : Pentamerida : Tetralobulidae : Tetralobula 485.4 - 468.1 Ma Paleozoic Xenelasma genus Animalia : Brachiopoda : Rhynchonellata : Pentamerida : Syntrophiidae : Xenelasma 485.4 - 468.1 Ma Paleozoic Rhynchonellida order Animalia : Brachiopoda : Rhynchonellata : Rhynchonellida 393.3 - 387.7 Ma Devonian Camarotoechia genus Animalia : Brachiopoda : Rhynchonellata : Rhynchonellida : Camarotoechiidae : Camarotoechia 427.4 - 419.2 Ma Paleozoic Cupularostrum genus Animalia : Brachiopoda : Rhynchonellata : Rhynchonellida : Trigonirhynchiidae : Cupularostrum 419.2 - 393.3 Ma Early/Lower Devonian Leiorhynchus genus Animalia : Brachiopoda : Rhynchonellata : Rhynchonellida : Leiorhynchidae : Leiorhynchus 387.7 - 382.7 Ma Devonian Machaeraria genus Animalia : Brachiopoda : Rhynchonellata : Rhynchonellida : Rhynchotrematidae : Machaeraria 419.2 - 393.3 Ma Early/Lower Devonian Rhynchotreta genus Animalia : Brachiopoda : Rhynchonellata : Rhynchonellida : Trigonirhynchiidae : Rhynchotreta 419.2 - 393.3 Ma Early/Lower Devonian Stegerhynchus genus Animalia : Brachiopoda : Rhynchonellata : Rhynchonellida : Rhynchotrematidae : Stegerhynchus 443.4 - 423 Ma Silurian Uncinulus genus Animalia : Brachiopoda : Rhynchonellata : Rhynchonellida : Uncinulidae : Uncinulus 427.4 - 419.2 Ma Paleozoic Ambocoelia genus Animalia : Brachiopoda : Rhynchonellata : Spiriferida : Ambocoeliidae : Ambocoelia 393.3 - 387.7 Ma Devonian Cyrtina genus Animalia : Brachiopoda : Rhynchonellata : Spiriferinida : Cyrtinidae : Cyrtina 419.2 - 382.7 Ma Devonian Delthyris genus Animalia : Brachiopoda : Rhynchonellata : Spiriferida : Delthyrididae : Delthyris 419.2 - 393.3 Ma Early/Lower Devonian Elita genus Animalia : Brachiopoda : Rhynchonellata : Spiriferida : Elythidae : Elita 393.3 - 387.7 Ma Devonian Howellella genus Animalia : Brachiopoda : Rhynchonellata : Spiriferida : Delthyrididae : Howellella 419.2 - 393.3 Ma Early/Lower Devonian Kozlowskiellina genus Animalia : Brachiopoda : Rhynchonellata : Spiriferida : Cyrtinopsidae : Kozlowskiellina 419.2 - 393.3 Ma Early/Lower Devonian Merista genus Animalia : Brachiopoda : Rhynchonellata : Athyridida : Meristidae : Merista 419.2 - 393.3 Ma Early/Lower Devonian Meristella genus Animalia : Brachiopoda : Rhynchonellata : Athyridida : Meristellidae : Meristella 419.2 - 393.3 Ma Early/Lower Devonian Meristina genus Animalia : Brachiopoda : Rhynchonellata : Athyridida : Meristellidae : Meristina 393.3 - 387.7 Ma Devonian Nucleospira genus Animalia : Brachiopoda : Rhynchonellata : Athyridida : Nucleospiridae : Nucleospira 419.2 - 387.7 Ma Devonian Protathyris genus Animalia : Brachiopoda : Rhynchonellata : Athyridida : Athyrididae : Protathyris 419.2 - 393.3 Ma Early/Lower Devonian Rhynchospirina genus Animalia : Brachiopoda : Rhynchonellata : Athyridida : Rhynchospirinidae : Rhynchospirina 419.2 - 393.3 Ma Early/Lower Devonian Spirifer genus Animalia : Brachiopoda : Rhynchonellata : Spiriferida : Spiriferidae : Spirifer 387.7 - 382.7 Ma Devonian Atrypa genus Animalia : Brachiopoda : Rhynchonellata : Atrypida : Atrypidae : Atrypa 419.2 - 393.3 Ma Early/Lower Devonian Coelospira genus Animalia : Brachiopoda : Rhynchonellata : Athyridida : Anoplothecidae : Coelospira 393.3 - 387.7 Ma Devonian Pseudoatrypa genus Animalia : Brachiopoda : Rhynchonellata : Atrypida : Atrypidae : Pseudoatrypa 393.3 - 387.7 Ma Devonian Nanothyris genus Animalia : Brachiopoda : Rhynchonellata : Terebratulida : Centronellidae : Nanothyris 419.2 - 393.3 Ma Early/Lower Devonian Lepocrinites genus Animalia : Echinodermata : Rhombifera : Callocystitidae : Lepocrinites 419.2 - 393.3 Ma Early/Lower Devonian Crinoidea class Animalia : Echinodermata : Crinoidea 485.4 - 393.3 Ma Paleozoic Arthroacantha genus Animalia : Echinodermata : Crinoidea : Hexacrinitidae : Arthroacantha 387.7 - 382.7 Ma Devonian Lasiocrinus genus Animalia : Echinodermata : Crinoidea : Mastigocrinidae : Lasiocrinus 387.7 - 382.7 Ma Devonian Crotalus genus Animalia : Chordata : Reptilia : Squamata : Viperidae : Crotalus 2.588 - 0.0117 Ma Pleistocene Felis genus Animalia : Chordata : Mammalia : Carnivora : Felidae : Felis 2.588 - 0.0117 Ma Pleistocene Mylohyus genus Animalia : Chordata : Mammalia : Artiodactyla : Tayassuidae : Mylohyus 2.588 - 0.0117 Ma Pleistocene Platygonus genus Animalia : Chordata : Mammalia : Artiodactyla : Tayassuidae : Platygonus 2.588 - 0.0117 Ma Pleistocene Cervidae family Animalia : Chordata : Mammalia : Artiodactyla : Cervidae 2.588 - 0.0117 Ma Pleistocene Castor canadensis species Animalia : Chordata : Mammalia : Rodentia : Castoridae : Castor : Castor canadensis 2.588 - 0.0117 Ma Pleistocene Ondatra zibethicus species Animalia : Chordata : Mammalia : Rodentia : Cricetidae : Ondatra : Ondatra zibethicus 2.588 - 0.0117 Ma Pleistocene Odocoileus virginianus species Animalia : Chordata : Mammalia : Artiodactyla : Cervidae : Odocoileus : Odocoileus virginianus 2.588 - 0.0117 Ma Pleistocene Mammuthus columbi species Animalia : Chordata : Mammalia : Proboscidea : Elephantidae : Mammuthus : Mammuthus columbi 2.588 - 0.0117 Ma Pleistocene Equus complicatus species Animalia : Chordata : Mammalia : Perissodactyla : Equidae : Equus : Equus complicatus 2.588 - 0.0117 Ma Pleistocene Equus giganteus species Animalia : Chordata : Mammalia : Perissodactyla : Equidae : Equus : Equus giganteus 2.588 - 0.0117 Ma Pleistocene Erethizon dorsatum species Animalia : Chordata : Mammalia : Rodentia : Erethizontidae : Erethizon : Erethizon dorsatum 2.588 - 0.0117 Ma Pleistocene Neotoma floridana species Animalia : Chordata : Mammalia : Rodentia : Cricetidae : Neotoma : Neotoma floridana 2.588 - 0.0117 Ma Pleistocene Marmota monax species Animalia : Chordata : Mammalia : Rodentia : Sciuridae : Marmota : Marmota monax 2.588 - 0.0117 Ma Pleistocene Microtus pennsylvanicus species Animalia : Chordata : Mammalia : Rodentia : Cricetidae : Microtus : Microtus pennsylvanicus 2.588 - 0.0117 Ma Pleistocene Platygonus cumberlandensis species Animalia : Chordata : Mammalia : Artiodactyla : Tayassuidae : Platygonus : Platygonus cumberlandensis 2.588 - 0.0117 Ma Pleistocene Platygonus vetus species Animalia : Chordata : Mammalia : Artiodactyla : Tayassuidae : Platygonus : Platygonus vetus 2.588 - 0.0117 Ma Pleistocene Sciurus carolinensis species Animalia : Chordata : Mammalia : Rodentia : Sciuridae : Sciurus : Sciurus carolinensis 2.588 - 0.0117 Ma Pleistocene Tamiasciurus hudsonicus species Animalia : Chordata : Mammalia : Rodentia : Sciuridae : Tamiasciurus : Tamiasciurus hudsonicus 2.588 - 0.0117 Ma Pleistocene Ursus americanus species Animalia : Chordata : Mammalia : Carnivora : Ursidae : Ursus : Ursus americanus 2.588 - 0.0117 Ma Pleistocene Gasconadia putilla species Animalia : Mollusca : Gastropoda : Sinuopeidae : Gasconadia : Gasconadia putilla 485.4 - 468.1 Ma Paleozoic Lecanospira compacta species Animalia : Mollusca : Gastropoda : Euomphalina : Ophiletidae : Lecanospira : Lecanospira compacta 485.4 - 468.1 Ma Paleozoic Hippocardia cumberlandiae species Animalia : Mollusca : Rostroconchia : Conocardiida : Hippocardiidae : Hippocardia : Hippocardia cumberlandiae 387.7 - 382.7 Ma Devonian Macluritella marylandica species Animalia : Mollusca : Macluritidae : Macluritella : Macluritella marylandica 485.4 - 468.1 Ma Paleozoic Hormotoma genus Animalia : Mollusca : Gastropoda : Murchisoniina : Hormotomidae : Hormotoma 427.4 - 419.2 Ma Paleozoic Tabulata subclass Animalia : Cnidaria : Anthozoa : Tabulata 419.2 - 393.3 Ma Early/Lower Devonian Cystoidea class Animalia : Echinodermata : Cystoidea 419.2 - 393.3 Ma Early/Lower Devonian Trepostomata order Animalia : Bryozoa : Stenolaemata : Trepostomatida 419.2 - 393.3 Ma Early/Lower Devonian Sylvilagus floridanus species Animalia : Chordata : Mammalia : Lagomorpha : Leporidae : Sylvilagus : Sylvilagus floridanus 2.588 - 0.0117 Ma Pleistocene Atrypa reticularis species Animalia : Brachiopoda : Rhynchonellata : Atrypida : Atrypidae : Atrypa : Atrypa reticularis 438.5 - 433.4 Ma Silurian Cypricardella tenuistriata species Animalia : Mollusca : Bivalvia : Carditida : Crassatellidae : Cypricardella : Cypricardella tenuistriata 382.7 - 372.2 Ma Late/Upper Devonian Glyptoglossella cavellosa species Animalia : Brachiopoda : Lingulata : Lingulida : Obolidae : Glyptoglossella : Glyptoglossella cavellosa 460.9 - 449.5 Ma Ordovician Glyptorthis equiconvexa species Animalia : Brachiopoda : Rhynchonellata : Orthida : Glyptorthidae : Glyptorthis : Glyptorthis equiconvexa 460.9 - 449.5 Ma Ordovician Ormoceras neumani species Animalia : Mollusca : Cephalopoda : Ormoceratidae : Ormoceras : Ormoceras neumani 468.1 - 460.9 Ma Middle Ordovician Zygosella vallata species Animalia : Arthropoda : Ostracoda : Palaeocopida : Zygobolbidae : Zygosella : Zygosella vallata 438.5 - 433.4 Ma Silurian Eocoelia sulcata species Animalia : Brachiopoda : Rhynchonellata : Rhynchonellida : Leptocoeliidae : Eocoelia : Eocoelia sulcata 443.4 - 423 Ma Silurian Pionomena neumani species Animalia : Brachiopoda : Strophomenata : Strophomenida : Glyptomenidae : Pionomena : Pionomena neumani 468.1 - 460.9 Ma Middle Ordovician Onychoplecia obesa species Animalia : Brachiopoda : Strophomenata : Orthotetida : Triplesiidae : Onychoplecia : Onychoplecia obesa 471.8 - 457.5 Ma Ordovician Conocerina bassleri species Animalia : Mollusca : Cephalopoda : Ellesmeroceratidae : Conocerina : Conocerina bassleri 485.4 - 477.7 Ma Paleozoic Conocerina beani species Animalia : Mollusca : Cephalopoda : Ellesmeroceratidae : Conocerina : Conocerina beani 485.4 - 477.7 Ma Paleozoic Ectenoceras perobliquum species Animalia : Mollusca : Cephalopoda : Cyrtendoceratidae : Ectenoceras : Ectenoceras perobliquum 485.4 - 477.7 Ma Paleozoic Eremoceras marylandicum species Animalia : Mollusca : Cephalopoda : Ellesmeroceratidae : Eremoceras : Eremoceras marylandicum 485.4 - 477.7 Ma Paleozoic Levisoceras arctedorsatum species Animalia : Mollusca : Cephalopoda : Nautilida : Nautilidae : Levisoceras : Levisoceras arctedorsatum 485.4 - 477.7 Ma Paleozoic Coelospira nitens species Animalia : Brachiopoda : Rhynchonellata : Athyridida : Anoplothecidae : Coelospira : Coelospira nitens 443.4 - 423 Ma Silurian
Fossil Localities	Click to show 15 fossil localities

Other Databases

Wikipedia:	https://en.wikipedia.org/wiki/Washington_County,_Maryland
Wikidata ID:	Q511164
GeoNames ID:	4372777

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References