Haylan, Jabal
"The Jabal Haylan area contains a 75-km-long chain of tuff cones and associated olivine basaltic lava flows in eastern Yemen. The chain crosses a NW-SE-trending fault extending between the highlands and desert lowlands to the east. One of the lava flows covers alluvial terraces that accumulated behind man-made dams dating back to about 800-1200 BC (Catalog of Active Volcanoes of the World)."  -Smithsonian Volcano Archive
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