Glauconie

The glauconie is an argillaceous mineral association intermediate between the group of the Mica S and the group of the Smectite S.

Not to confuse with the Glauconite, which is an argillaceous mineral composing the glauconie.

Description

Its name comes from the Greek Glaukos (blue-green).
The glauconite is generally earthy, resembling Chlorite. Coarsely crystalline. Opaque. Glare chechmate. Color yellowish, green green olive with green noirâtre. Greenish dust.

Formation

It is a mineral of diagenetic deterioration of the Biotite or of volcanic glass being formed in seamen circle (continental shelf) under reducing conditions. It characterizes the condensed levels and testifies to a deceleration of sedimentation.

Presence

Mineral ubiquist it is in sandstone, Calcaire S and Sable S glauconitic. It is particularly abundant in the United States (Alabama), in New Zealand and with Villers-on-Sea (Calvados, France).

Associated minerals

Detrital minerals littoral, Carbonate S, Silicate S of deterioration of the rocks.

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