这是对亚利桑那州前寒武纪历史的有效假设

Mogollon Rim Region, East-Central Arizona Pub Date : 1900-01-01 DOI:10.56577/ffc-13.52

G. Gastil

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引用次数: 1

摘要

在亚利桑那州，前寒武纪地被分为“年轻前寒武纪”(阿帕奇群，大峡谷系列)和“老前寒武纪”(其他所有)。新前寒武纪覆于老前寒武纪之上，具有明显的构造和变质不整合。为了对我们所关心的岩石有一个大致的了解，我将把对岩石进行了仔细研究的几个地区的地层学加以概括。在许多情况下，地层单位的层序是未知的。和

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A working hypothesis for Arizona's older Precambrian history

In Arizona, the Precambrian terrane is divided into "Younger Precambrian" (Apache group, Grand Canyon series) and "Older Precambrian" (everything else). The Younger Precambrian overlies the Older Precambrian with marked structural and metamorphic unconformity. To give an outline picture of the rocks we are concerned with, I will abstract the stratigraphy of the several areas where the rocks have been studied carefully. The strata] units are, in many cases, of unknown stratigraphic order. and

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Mogollon Rim Region, East-Central Arizona

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