Dismicrite is a type of micritic limestone that contains irregular patches or pockets of sparry calcite (coarse crystalline calcite) within a fine-grained micritic matrix. The term is derived from : Features or Properties of Dismicrite Texture : Fine grained (micritic) with sparry calcite patches. Composition : Mainly micrite (carbonate mud, CaCO3) with coarser sparry calcite […]
The Alizarin Res S Test is a staining technique used in petrology to distinguish between calcite and dolomite. How it works Procedure “If the rock contains both dolomite and calcite, only the calcite areas will stain red, while the dolomite remains unstained.” Applications of Alizarin Res S Test
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Sandstone maturity refers to the degree of weathering, sorting, and rounding of grains within a sandstone, as well as the composition of the rock. It’s a measure of how far the sand has been transported and reworked, reflecting the degree of sedimentary cycle. Maturity is assessed through both textural and compositional characteristics. Mineralogical maturity (also called as compositional
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A wrench fault, also known as strike-slip fault, is a type of fault where the movement of blocks is primarily horizontal and is parallel to the strike of the fault plane. These can be either : These faults often form in transform plate boundaries or in strike-slip tectonic regimes and can be associated with complex
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Imbricate structure (or imbrication) is a geological fabric seen in clastic sedimentary rocks—especially in conglomerates and gravels—where elongated or flat clasts (like pebbles) are stacked or aligned in a consistent overlapping pattern, much like fallen dominoes or roof shingles. Mechanism Imbrication occurs due to the directional flow of water or wind, which exerts force on
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Mud cracks are the fracture patterns that formed in the muddy sediments, in sub-aerial environment. They are of two types :- Desiccation Cracks Syneresis Cracks Why are mud cracks important ?
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The Clarion-Clipperton Zone (CCZ) is a vast abyssal plain in the central Pacific Ocean, covering approximately 6 million square kilometers (about the size of Europe). It is one of the richest sources of manganese nodules, containing high concentrations of nickel (Ni), copper (Cu), cobalt (Co), and manganese (Mn)—all critical for modern technology and renewable energy.
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Coal can act as a source rock for the generation f liquid hydrocarbons. The production of liquid hydrocarbons from coal is similar to that of type III kerogen, reflecting the origin of the organic matter in coal and type III kerogen, primarily from hydrogen -poor (lipid-poor) and oxygen rock vascular plants. Petroleum generation during coalification
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The Rock-Eval pyrolysis is a widely used geochemical technique in petroleum exploration and organic geochemistry. It provides valuable information on the quantity, type and thermal maturity of organic matter in sedimentary rocks, helping geologists asses hydrocarbon generation potential. Principles of Rock-Eval Pyrolysis Rock Eval pyrolysis involves heating a rock sample in an inert atmosphere and
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Gas Chromatography is a chromatographic technique used to separate volatile compounds and those which can vaporized by heat. If a mixture of compounds is analysed using GC system, each compound can be separated and quantified. It is useful and important because of following – Components of gas chromatography This is the overall main components of
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