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Harra of Arhab : ウィキペディア英語版 | Harra of Arhab
The mainly Quaternary Volcanic field of Harra of Arhab is the northernmost historically active volcanic field in Yemen. It has erupted once historically, in Pre-Islamic times. __NOTOC__ ==Morphology== The field is located on a 1500 km2 volcanic plateau. The plateau contains a few small (older) stratovolcanoes and 60 volcanic cones. The field is arranged on a N-NW line. Younger Basaltic rocks from the Pliocene-Holocene (northern end of the field), overlie Rhyolitic rocks from the Oligocene-Miocene, which covers most of the field. The volcano is located 30 km north of Yemens capital city, Sana'a.
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