Psammite (Greek Psammos, Sand) is a general term for a sandstone, most often used to describe a metamorphosed rock unit with a dominantly sandstone protolith. An alternative term, more commonly used for unmetamorphosed sediments, is arenite (adj arenaceous). Pettijohn gives the following descriptive terms based on grain size, avoiding the use of terms such as "clay" or "argillaceous" which carry an implication of chemical composition:
|Coarse||Gravel(ly)||Psephite (psephitic)||Rudite (rudaceous)|
|Medium||Sand(y)||Psammite (psammitic)||Arenite (arenaceous)|
|Fine||Clay(ey)||Pelite (pelitic)||Lutite (lutaceous)|
Laurentian Provenance and an Intracratonic Tectonic Setting for the Moine Supergroup, Scotland, Constrained by Detrital Zircons from the Loch Eil and Glen Urquhart Successions
Sep 01, 2004; Abstract Detrital zircons in Psammite from the type section of the Loch Eil Group of the Moine Supergroup, NW Scotland,...
Carbonate Isotope Chemostratigraphy Suggests Revisions to the Geological History of the West Finnmark Caledonides, Northern Norway
Mar 01, 2006; Abstract: Strontium and carbon isotopic data from amphibolite-facies marbles of the Falkenes formation, Sørøy succession...