| 单词 | graywacke |
| 释义 | graywackeor grey·wacke[ grey-wak, -wak-uh ] / ˈgreɪˌwæk, -ˌwæk ə / nounGeology. a dark-gray coarse-grained wacke. Origin of graywacke1805–15; partly translation, partly adapted from German Grauwache;see wacke Words nearby graywackegray squirrel, gray substance, gray syndrome, gray trout, gray urn, graywacke, gray water, graywether, gray whale, gray wolf, Graz Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 Example sentences from the Web for graywacke
Scientific definitions for graywackegraywacke [ grā′wăk′, -wăk′ə ] Any of various dark gray, coarse-grained sandstones that contain abundant feldspar and rock fragments and often have a clay-rich matrix. Graywackes are thought to originate in environments where erosion, transportation, and deposition happen so quickly that minerals and rock fragments do not have sufficient time to break down into finer constituents. The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved. |
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