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CLASTCollege of Liberal Arts, Sciences and Technologies (Gallaudet University; Washington, DC)
CLASTCollege Level Academic Skill Test
CLASTCentre for Learning and Social Transformation (Australia)
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Iron-rich sandstone clasts are common in the CB/C horizons, and several were observed in the >16mm fraction of the A1 horizon (Fig.
The age of the Buchans Group is based on Whiterockian conodonts recovered from carbonate clasts (Nowlan and Thurlow 1984, 1987) and U-Pb zircon ages (462 [+ or -] 3 and 465 [+ or -] 3 Ma) from the upper part of the unit (Zagorevski et al.
At the middle school and high school levels, CLAST will focus on providing the latest sophisticated technology to improve STEM education.
Students may take the CLAST as many times as necessary, and according to Windham, "the vast majority" pass it eventually--if not on the first try.
Lenticular goethite-enriched interlayers of conglomerate often occur, in which clasts of siltstone and silty claystone are enclosed into sandy matrix.
Conglomerate is commonly polymictic, displaying subangular, sub-rounded and angular clasts up to 8 cm across of local basement rock lithologies; granodiorite, diorite, and quartzite are especially common.
Clasts are spherical and well rounded, with a maximum diameter of 17 cm.
In contrast, the domains that border clast particles are always oriented parallel to the clast surfaces; they are larger, and form bands 100-350 [micro]m thick along the clast surfaces.
To construct the stratigraphic sequence of Figure 3, the ratio and succession of different rock types and non-exposed intervals was recorded for each interval, emphasizing clast size, shape, and lithotype abundance.
Hominins at Kanjera South utilized a wider variety of lithic raw materials than found at most Oldowan sites, some of which (chert, quartz, quartzite) must have been transported from outside the immediate vicinity of the deposits since they are not present in the local clast population.