Very little trees may be found except at the outer margin (typically Acacia ehrenbergiana and Prosopis cineraria).
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From 1844 to 1849, by way of requests from Muhammad Ali and Abbas I, he embarked on a number of expeditions in Egypt, Anatolia and the Arabian desert in order to search for marble and coal.
He married Kathleen Elizabeth Ray on November 18, 1937 shortly before heading off to Saudi Arabia by himself for what ended up being three years exploring potential oil sites in the Saudi Arabian desert along with fellow American geologists Max Steineke, Jerry Harriss, Ernie Berg and others as well as a group of Bedouin guides headed by Khamis bin Rimthan of the Ajman tribe.