Marl or Marlstone is a calcium carbonate or lime-rich mud or mudstone which contains variable amounts of clays and aragonite. Calcium carbonate is a Chemical compound with the Chemical formula Ca[[Carbon C]] O 3 Mudstone (also called mudrock) is a fine grained Sedimentary rock whose original constituents were Clays or Muds Grain size is up Clay is a naturally occurring material composed primarily of fine-grained Minerals which show plasticity through a variable range of Water content, and Aragonite is a Carbonate mineral, one of the two common naturally occurring polymorphs of Calcium carbonate, Ca[[carbon C]] O 3 Marl is originally an old term loosely applied to a variety of materials, most of which occur as loose, earthy deposits consisting chiefly of an intimate mixture of clay and calcium carbonate, formed under freshwater conditions; specifically an earthy substance containing 35-65% clay and 65-35% carbonate[1]. The term is today often used to describe indurated marine deposits and lacustrine (lake) sediments which more accurately should be named marlstones. Sediment is any particulate matter that can be transported by fluid flow and which eventually is deposited as a layer of solid particles on the bed or bottom of a body of Marl or Marlstone is a Calcium carbonate or lime -rich mud or Mudstone which contains variable amounts of Clays and Aragonite Marlstone is an indurated rock of about the same composition as marl, more correctly called an earthy or impure argillaceous limestone. Argillaceous minerals appear silvery upon optical reflection and are Minerals containing substantial amounts of Clay -like components (ἄργιλλος = clay It has a blocky subconchoidal fracture, and is less fissile than shale. The term marl is widely used in English-language geology, while the terms Mergel and Seekreide (German for "sea chalk") are used in European references.
The lower stratigraphic units of the chalk cliffs of Dover consist of a sequence of glauconitic marls followed by rhythmically-banded limestone and marl layers. Stratigraphy, a branch of Geology, studies rock layers and layering ( stratification) Chalk (ʧɔːk is a soft white porous Sedimentary rock, a form of Limestone composed of the Mineral Calcite. The white cliffs of Dover are Cliffs which form part of the British coastline facing the Strait of Dover and France. Glauconite is a phyllosilicate ( Mica group Mineral. It can also be referred to as an iron silicate Limestone is a Sedimentary rock composed largely of the Mineral Calcite ( Calcium carbonate: CaCO3 Similar upper Cretaceous cyclic sequences in Germany have been correlated with Milankovitch orbital forcing. The Cretaceous (kriːˈteɪʃəs, usually abbreviated 'K' for its German translation "Kreide" is a geologic period and system, reaching from the end of Germany, officially the Federal Republic of Germany ( ˈbʊndəsʁepuˌbliːk ˈdɔʏtʃlant is a Country in Central Europe. Milankovitch cycles are the collective effect of changes in the Earth 's movements upon its climate named after Serbian civil engineer and Mathematician
Marl as lacustrine sediment is common in post-glacial lake bed sediments, often found underlying peat bogs. A glacial lake is a Lake with origins in a melted Glacier. Glacial lakes can be green as a result of pulverized minerals ( Rock flour) that support A bog or mire is a Wetland type that accumulates Acidic Peat, a deposit of dead plant material &ndash usually Mosses but also It has been utilized as a soil conditioner and acid soil neutralizing agent. It is a soft, loose, earthy, material that consists of varying amounts of calcium carbonate, clay, and silt size material and is formed primarily in freshwater conditions (Hubbard and Herman, 1990).
References
- Schurrenberger, D. , Russell, J. and Kerry Kelts. 2003. Classification of lacustrine sediments based on sedimentary components. Journal of Paleolimnology 29: 141-154.
- Chalk of Kent by C. S. Harris Accessed 11/06/2005
- Geochemistry and time-series analyses of orbitally forced Upper Cretaceous marl–limestone rhythmites, abstract Accessed 11/06/2005
- Palaeoenvironmental Interpretation of the Early Postglacial Sedimentary Record of a Marl Lake Accessed 11/06/2005
- ^ Sedimentary Rocks. Pettijohn, F. J. , Harper& Brothers New York 1957, p. 410
See also
Agricultural lime, also called garden lime, is a Soil additive made from pulverized Limestone or Chalk.Dictionary
marl
-noun
- A mixed earthy substance, consisting of carbonate of lime, clay, and possibly sand, in very variable proportions, and accordingly designated as calcareous, clayey, or sandy.
-verb
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