...He spurred round the same great rock a minute later, and was faced by a blank wall of shale that brought his horse up all standing... 
Talbot Mundy 「King--of the Khyber Rifles」
...Such a "set," if longestablished, will penetrate through earth, clay, and sub-soil, to somestratum of shale, or sand, or loose rock...
Alfred E. Pease 「The Badger」
...The new skeleton of Hesperoherpeton lies in an oblong block oflimy shale measuring approximately 100×60 mm...
Theodore H. Eaton 「A New Order of Fishlike Amphibia From the Pennsylvanian of Kansas」
...Riffles 8-12 feet wide, 6 inches deep, bottom of flat, fragmented shale; pools having shale and mud bottom; water slightly turbid...
James E. Deacon 「Fishes of the Wakarusa River in Kansas」
...Specimensare found scattered throughout the Rock Lake shale (see p...
Joan Echols 「A New Genus of Pennsylvania Fish (Crossoperygii, Coelacanthiformes) from Kansas」
...His feet struck a shale bottom...
Various 「Astounding Stories of Super-Science, December 1930」
...Perhaps it combined with the sparkling white shale...
Charles Willard Diffin 「Two Thousand Miles Below」
...In the bed of the river several fragments of jasper and black shale werefound, the latter appearing to belong to the coal formation...
A C and F T Gregory 「Journals of Australian Explorations」
...Descending into a valley with a drycreek fifteen yards wide, the rocks on the south-east slope chertylimestone alternating with thin beds of shale, the strata dipping 20degrees to 30 degrees west...
A C and F T Gregory 「Journals of Australian Explorations」
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