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In particular, his scientific liaison with the Scottish geologist Roderick Murchison (1792-1871) made him a contributor to the discovery of the Silurian system, and the first systematic description of sedimentary rocks and their index fossils.
It was active as a normal fault during deposition of Late Ordovician to mid-Silurian sedimentary rocks, downthrowing to the northwest.
A diachronous (Greek dia, through + Chronos) deposit in Geology is a sedimentary rock formation in which apparently similar material varies in age from place to place.
Edeowie glass is a slag-like, opaque rare natural glass found as vesicular or in sheet-like masses in a semi-continuous swath in baked sediment, about 55 km long and 10 km wide along the western side of the Flinders Ranges near Parachilna, South Australia and Lake Torrens.
For this exhibit, Boozer used samples of excavated sedimentary rock and soil found at the nearby construction site of CityCenterDC, to recreate a geologically accurate linear progression of the earth below the gallery and city, by laying stratum after stratum in a narrow lengthwise band down the centre of the gallery floor.
In common with most of the range, the terrain is characterised by hard sedimentary rock covered with heather, making progress on foot difficult.
This site is designated due to its geological quality: Robeston Wathen Quarries SSSI has one special feature: Caradoc - Ashgill (late Ordovician) sedimentary rocks in disused quarries
The Wahweap Formation is part of the Grand Staircase region, an immense sequence of sedimentary rock layers that stretch south from Bryce Canyon National Park through Zion National Park and into the Grand Canyon.
The mountains consist primarily of sedimentary rock, limestone, sandstone and shale, of Jurassic, Cretaceous and Paleogene origin on a Precambrian granitic basement.