Rocks in the southeasterly portion of the Tejon Quadrangle include pre-Cambrian (?), Paleozoic (?), Jurassic granitic rocks, and a thick series of Cenozoic sediments. All epochs of the two periods of the Cenozoic are represented. Lower Eocene (Martinez) marine beds are overlain unconformably by middle Eocene (Domengine) rocks, also marine. Olig...

Rocks in the southeasterly portion of the Tejon Quadrangle include pre-Cambrian (?), Paleozoic (?), Jurassic granitic rocks, and a thick series of Cenozoic sediments. All epochs of the two periods of the Cenozoic are represented. Lower Eocene (Martinez) marine beds are overlain unconformably by middle Eocene (Domengine) rocks, also marine. Olig...

Geologic mapping provides structural and stratigraphic observations which lead to new insights into the magnitude, timing, and rate of Cenozoic extensional tectonism in the Death Valley region of the Basin and Range province in the western United States. Detailed mapping of the Grapevine Mountains, in northeastern Death Valley, yields new infor...