Paleocene to holocene paleodeltas of ancestral colorado river offset by the San Andreas fault system, southern California
Paleocene to holocene paleodeltas of ancestral colorado river offset by the San Andreas fault system, southern California
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科罗拉多河祖先河的古新世至全新世古三角洲被南加州圣安德烈亚斯断层系统抵消
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发表时间：
1996
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影响因子：
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通讯作者：
J. Howard
中科院分区：
文献类型：
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作者：
J. Howard
洛杉矶和文图拉盆地的古新世晚期至中新世中期河流-三角洲岩是在圣安德烈亚斯断层右旋位移300 km之前由科罗拉多古河流沉积的。在中新世晚期，断层上的运动和索尔顿海槽中的相关裂谷使古河流改道进入原始加州湾。上新世以来，移动的科罗拉多三角洲沉积中心沿着断层的平移逐渐向东南方向填充索尔顿海槽。假设的科罗拉多古河流大约沿着现在河流的下游向北延伸，在那里与吉拉和阿马戈萨古支流汇合。晚新生代的构造运动破坏了阿马戈萨古河流，并形成了流经大峡谷下游的科罗拉多河的现代河道。
Upper Paleocene to middle Miocene fluvial-deltaic rocks in the Los Angeles and Ventura basins were deposited by a Colorado paleoriver prior to 300 km of dextral displacement on the San Andreas fault. During the late Miocene, movement on the fault and associated rifting in the Salton trough rerouted the paleoriver into the proto–Gulf of California. Since the Pliocene, translation of a moving Colorado deltaic depocenter along the fault has filled the Salton trough progressively southeastward. The postulated Colorado paleoriver extended north approximately along the lower course of the present river where it joined with Gila and Amargosa paleotributaries. Late Cenozoic tectonism disrupted the Amargosa paleoriver, and the modern course of the Colorado River through the lower Grand Canyon was developed.