Karoo Supergroup Malawi, as well as on other continents that were part of Gondwana. The basins in which it was deposited formed during the formation and breakup of Pangea. The type area of the Karoo Supergroup is the Great Karoo in South Africa, where the most extensive outcrops of the sequence are exposed. Its strata which consist mostly of shales and sandstones, record an almost continuous sequence of marine glacial to terrestrial deposition from the Late Carboniferous to the Early Jurassic. These accumulated in a retroarc foreland basin called the "main Karoo" Basin. This basin was formed by the subduction and orogenesis
The Oregon Desert The Oregon Desert The Oregon Desert is a non-fiction book about the high desert region of eastern Oregon. It highlights both the people and natural history of Oregon's high desert country using serious science, first-hand narrative history, and humorous anecdotal stories. It was written by E. R. Jackman and R. A. Long. The book was first published in 1964 and has never been out of print since its initial release. Edwin Russell (E.R.) Jackman was an American agricultural expert from Oregon. He worked for Oregon State University as a rural extension agent and a farm crop specialist from 1929 until