greensand

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green·sand

 (grēn′sănd′)
n.
A sand or sediment having a dark greenish color caused by the presence of glauconite.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

greensand

(ˈɡriːnˌsænd)
n
(Geological Science) an olive-green sandstone consisting mainly of quartz and glauconite
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

green•sand

(ˈgrinˌsænd)

n.
a sandstone containing much glauconite, which gives it a greenish hue.
[1790–1800]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.greensand - an olive-green sandstone containing glauconite
sandstone - a sedimentary rock consisting of sand consolidated with some cement (clay or quartz etc.)
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
References in classic literature ?
But now we may read in the Supplement to Lyell's 'Manual,' published in 1858, clear evidence of the existence of whales in the upper greensand, some time before the close of the secondary period.

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