glauconitic sandstone

glauconitic sandstone

[¦glȯ·kə¦nid·ik ′san‚stōn]
(petrology)
A quartz sandstone or an arkosic sandstone that has many glauconite grains.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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It is followed by a glauconitic sandstone lithofacies which is friable, fine to medium grained and occasionally carbonaceous (Fig.
Notation SK SL Quarry location Kocbere Libnava Age Cretaceous (Cenomanian) Petrography Glauconitic sandstone; Glauconitic massive texture; sandstone; fine-grained banded texture; fine-grained Mineralogical Quartz (83%); Quartz (71%); composition K-feldspar (2%); K-feldspar (8%); muscovite, rutile, glauconite (3%); tourmaline, zircon (1%) zircon, titanite (1%) Notation SZ Quarry location Zamel Age Petrography Glauconitic sandstone; schistose texture; medium-grained Mineralogical Quartz (79%); composition glauconite (9%); feldspars (4%); muscovite (1%) TABLE 2: XRF chemical composition of tested materials.
Provenance: Low silisiclastic contents in the green sandstone indicate a distant or low relief source, but the presence of the glauconitic sandstone suggests intermittent influxes of coarse silisiclastic material, possibly by turbidity current (Plates 7 and 8).
One can find the phosphatic Obolus sandstone, including brachiopod bivalves and fragments, radioactive alum shale, glauconite-rich gray bentonite clay and glauconitic sandstone. The Middle Ordovician rocks (ca 460-470 million years old) in the area are represented by ca 15-20-metre-thick carbonate rocks [4].
Fewer than 60 specimens assigned to 18 species were previously recorded from the calcareous glauconitic sandstone of the Maekula Member (Schmidt 1904, 1907; Lamansky 1905; Opik 1937; Balashova 1961, 1966).
At the upstream end of the section, hard, very fossiliferous glauconitic sandstone forms a shoal across the channel (Locality 1).
The Chichali Formation revealed laterite, glauconitic sandstone and carbonaceous green shale lithofacies, representing middle to outer ramp depositional environment.
###Cambrian###Kussak Formation###Gray and purplish shale and glauconitic sandstone. pebble bed at base.
The Kussak Formation consisted of glauconitic sandstone and shale interbedded lithofacies, borrowed glauconitic sandstone lithofacies, based which a shallow marine depositional settings is suggested.
The outcrop shows a 4-5 m thick succession of sedimentary rocks beginning with the early Cambrian Tiskre sandstone and ending with the glauconitic sandstone of the Leetse Formation (Arenig) in the upper part of the outcrop.