Greensand

Greensand or green sand is a sand or sandstone which has a greenish color. This term is specifically applied to shallow marine sediment that contains noticeable quantities of rounded greenish grains. These grains are called glauconies and consist of a mixture of mixed-layer clay minerals, such as smectite and glauconite. Greensand is also loosely applied to any glauconitic sediment.^[1]^[2]^[3]

^ Odin, G. S., ed. (1988). Green Marine Clays. Developments in Sedimentology. Vol. 45. Amsterdam: Elsevier. ISBN 978-0-444-87120-6.
^ Pettijohn, F. J.; Potter, P.; Siever, R. (1987). Sand and Sandstone. New York, NY: Springer-Verlag.^{[ISBN missing]}
^ Neuendorf, K. K. E.; Mehl, J. P. Jr.; Jackson, J. A., eds. (2005). Glossary of Geology (5th ed.). Alexandria, VA: American Geological Institute. ISBN 0-922152-76-4.

[Odin1988a-1] Odin, G. S., ed. (1988). Green Marine Clays. Developments in Sedimentology. Vol. 45. Amsterdam: Elsevier. ISBN 978-0-444-87120-6.

[Pettijohn-2] Pettijohn, F. J.; Potter, P.; Siever, R. (1987). Sand and Sandstone. New York, NY: Springer-Verlag.^{[ISBN missing]}

[Neuendorf_Others_2005-3] Neuendorf, K. K. E.; Mehl, J. P. Jr.; Jackson, J. A., eds. (2005). Glossary of Geology (5th ed.). Alexandria, VA: American Geological Institute. ISBN 0-922152-76-4.

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