Glauconite particles are one of the main components of greensand and glauconitic sandstone, and glauconite has been called a marl in an old and broad sense of that word.
22.
Glauconite particles are one of the main components of greensand and glauconitic sandstone, and glauconite has been called a marl in an old and broad sense of that word.
23.
More importantly for the consideration of effective porosity, though, glauconite grains ( part of the Vsh ) have intra-particular microporous pore space which retains capillary-bound water.
24.
The formation is one to three hundred metres thick, and comprises shales, silt-and sand-stones with a high glauconite content . and has yet to be formally ratified.
25.
Some of the beds contain iron oxide / hydroxide minerals, such as hematite or limonite, giving red or brown varieties, while other beds contain glauconite giving a green ( or occasionally blue ) colour.
26.
As the rock enters the submetamorphic field, generally Zeolite facies metamorphism, clay minerals begin to recrystallize into low-temperature metamorphic phyllite minerals such as chlorite, prehnite, pumpellyite, glauconite and so forth.
27.
Two areas of exceptions along the Orne Champagne are alluvial deposits ( sands, silts and peats ) and between the Libroreau farm and the railroad, composed of Glauconite clay, used in iron ore, date back to the lower Cenomanian.
28.
Locally the Breda Formation can be subdivided into conglomerate in which shark teeth and whale bones were found ), the Zenderen Member ( green, glauconiferous fine sand ) and the Delden Member ( sandy, glauconite and goethite bearing clay and loam.
29.
When bioclasts are in its rock formation, meaning that they have gone through all the stages that sediments go through to reach its final phase, a whole rock unit, it is accompanied and mixed with variable amount of terrigenous material, glauconite particles and also phosphate grains.
