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Upper Silurian Genessee Slate
Big Stream point, & Lodi, Seneca Co, below the Falls, N York
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P 4p68 ["P 4p68" written in pencil] // Orbicula lugubris, Conrad, ^Med Ter. Foss. p 75 pl 43 fig 2; Capulus ["Capulus" is underlined] lugubris ["lugubris" is underlined] Conrad, Tour Ac. Nat Sc. Vol 7 p 143
Lubonbiular, irregular, with radiating rugose lines, obsolete or wanting except on the space anterior to the apex, where they are distinct. L. H- H 1.2
Medial Tertiary
St Mary's Co Md. Petersburgh Va
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Orbicula lugubris,
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Medial Tertairy [Tertiary]
Wilmington N. Car
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Orbicula minuta, Hall, N.Y. [James Hall Jr. (September 12, 1811 – August 7, 1898) was an American geologist and paleontologist. He was a noted authority on stratigraphy and had an influential role in the development of paleontology in the United States.] Geol. Rep. p 182 fig 9
Orbicular; surface marked by concentric lines.
D 0.05 to 0.15