150Lec18-1

150Lec18-1 - Lecture #18: East African Rift Zone (Abbott,...

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Lecture #18: East African Rift Zone (Abbott, pp. 62-65, 240) Know that the volcanoes mentioned in this lecture are in Africa. As mentioned earlier, spreading zones are divergent plate boundaries where magma is rising and producing new crust on two adjacent plates (Figure 3.12, p 59; Figure 8.6, p. 189; Figure 3.15, p. 61). Spreading zones often separate oceanic plates, but they may also breakup continental plates. As shown in Figure 3.20 (p. 65), spreading zones pass through the Red Sea and the Gulf of Aden between Africa and the Arabian Peninsula. On the north end of the Red Sea, the spreading zone terminates at the left-lateral Dead Sea transform fault between Jordan and Israel/Palestine (Figure 3.31, p. 74). In the south, the rift system enters east Africa (Figure 3.3, p. 52; Figure 3.20, p. 65). At least one hot spot is located in Ethiopia at the junction between the Red Sea, Aden, and East African rifts (Figure 8.37, p. 211). East Africa is in the process of separating from the rest of Africa.
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150Lec18-1 - Lecture #18: East African Rift Zone (Abbott,...

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