greensand

[ green-sand ]

/ ˈgrinˌsænd /

a sandstone containing much glauconite, which gives it a greenish hue.

Origin of greensand

First recorded in 1790–1800; green + sand

The glauconitic grains of the Greensand formations are chiefly foraminiferal casts.

Encyclopaedia Britannica, 11th Edition, Volume 10, Slice 6 |Various
It consists of a dark blue marl, sometimes intermixed with greensand.

A Manual of Elementary Geology |Charles Lyell.
The Aptien (or Greensand) consists generally of marls and clay.

The World Before the Deluge |Louis Figuier
Here and there the Greensand forms prominent hills, as that on which the town of Shaftesbury stands.

Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 6 |Various

The "coprolites" were phosphatic nodules found in the greensand and dug for use as manure.

Early Britain--Roman Britain |Edward Conybeare

greensand

/ (ˈɡriːnˌsænd) /

an olive-green sandstone consisting mainly of quartz and glauconite