traprock

traprock:

see Triassic periodTriassic period
, first period of the Mesozoic era of geologic time (see Geologic Timescale, table) from 205 to 250 million years ago.

Throughout the Triassic, E North America, as a result of the mountain-building episode that formed the Appalachians in the late Paleozoic
..... Click the link for more information. .

traprock

A dark-colored igneous rock having a fine-grained, more or less columnar structure.

trap

², traprock1. any fine-grained often columnar dark igneous rock, esp basalt 2. any rock in which oil or gas has accumulated

单词	traprock
释义	DictionarySeetrap traprock traprock: see Triassic periodTriassic period , first period of the Mesozoic era of geologic time (see Geologic Timescale, table) from 205 to 250 million years ago. Throughout the Triassic, E North America, as a result of the mountain-building episode that formed the Appalachians in the late Paleozoic ..... Click the link for more information. . traprock A dark-colored igneous rock having a fine-grained, more or less columnar structure. trap ², traprock1. any fine-grained often columnar dark igneous rock, esp basalt 2. any rock in which oil or gas has accumulated MedicalSeeTRAP
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