WTF
美国· Alaska未知
概述
Massive layers on both sides of large, E-W-trending syncline, up to 130 m thick. WTF on N limb of syncline. U-Pb zircon ages for the host rhyolite are 372 Ma, 363 Ma, and 356 Ma.
地质背景
构造环境: Bimodal-felsic in epicontinental arc
资源与开采
数据溯源
数据来源: USGS MRDS