cherty
31Prehistoric numerals — Counting in prehistory was first assisted by using body parts, most notably the fingers. This is reflected in the etymology of certain number names, notably in the names of ten and hundred in the Proto Indo European numerals, both… …
32Rundle Group — Stratigraphic range: Middle to Late Mississippian …
33Moylehid — (from Irish: Mulleithid/Maol Leathan meaning broad bare hill ) is a townland in County Fermanagh, Northern Ireland. It is in the civil parish of Boho.[1] History Moylehid provides archeological proof of neolithic settlement in the BohoBoho,… …
34Fernie Formation — (Group) Stratigraphic range: Jurassic Fernie shales exposed in the mountains near Fernie …
35Old Port Formation — Stratigraphic range: Early Devonian Ridgeley Member of the Old Port Formation Type sedimentary Unit of …
36Vannóvskoye — Ванновское Vannóvskoye Bandera …
37 Ferecetotherium — Ferecetotherium …
38Калакейтто — Лохикейтто …
39porcellanite — A dense, siliceous rock formed as a indurated or baked clay or shale with a dull, light colored, cherty appearance, often found in the roof or floor of a burned out coal seam. GG …
40chert — [tʃə:t] noun a hard, dark, opaque rock composed of silica (chalcedony) with an amorphous or microscopically fine grained texture. Derivatives cherty adjective Origin C17 (orig. dialect): of unknown origin …
