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  1. megalodon

    Image Processing – Correction

    Radiometric Correction As any image involves radiometric errors as well as geometric errors, these errors should be corrected. Radiometric correction is to avoid radiometric errors or distortions, while geometric correction is to remove geometric distortion. When the emitted or reflected...
  2. megalodon

    Weathering and Erosion

    Weathering and erosion are the processes responsible for disintegration, transportation, and deposition of rocks. These processes occur when the rocks are exposed to atmosphere and biosphere. Weathering Weathering is a process of weakening and dissolving rock minerals through physical...
  3. megalodon

    Bowen’s Reaction Series

    In the early 1900’s, N. L. Bowen and others at the Geophysical Laboratories in Washington D.C. began experimental studies into the order of crystallization of the common silicate minerals from a magma. The idealized progression which they determined is still accepted as the general model for the...
  4. megalodon

    Porosity

    The porosity of a rock is the fraction of the volume of space between the solid particles of the rock to the total rock volume. Space includes all pores, cracks, vugs, inter and intra-crystalline spaces. The porosity is conventionally given the symbol f and is expressed either as a fraction...
  5. megalodon

    Which ocean has more numerous volcanoes around it?

    (A) Indian (B) Atlantic (C) Arctic (D) Pacific Volcanic eruptions occur only in certain places and do not occur randomly. The tectonic plates form Earth's crust as they float on a hot mantle. These rigid plates collide, spread apart or slide past each other. The volcanoes form due to such...
  6. megalodon

    Who first proposed the term Isostasy?

    (A) Sir George Airy (B) Clarence Dutton (C) R. A. Daly (D) Archdeacon Pratt Isostasy or isostatic equilibrium is the state of gravitational equilibrium between Earth's crust and mantle such that the crust floats over mantle at an elevation depending on its thickness and density. This concept...
  7. megalodon

    What is the study of landforms, their processes, form and sediments called?

    (A) Geomorphology (B) Geomythology (C) Geophysics (D) Glaciology Geomythology is the study of alleged references to geological events in mythology. A geologist at Indiana University, Dorothy Vitaliano, first coined the term in 1968. It's not a mainstream branch of geology and is relatively...
  8. megalodon

    When was the first Geological map of Great Britain published?

    (A) 1807 (B) 1812 (C) 1815 (D) 1821 William Smith knew how to draw the vertical extent of the rocks but didn't know how to display them horizontally. He found a map showing types of soils and vegetation around Bath and their geographical extent with different types colored. He drew a crude...
  9. megalodon

    Who is known as the Father of modern Geology?

    (A) Abraham Gottlob Werner (B) James Hutton (C) Florence Bascom (D) William Smith Abraham Gottlob Werner (25 September 1749 – 30 June 1817) was a German geologist who proposed a theory about the stratification of the Earth's crust. He is remembered for his theory on chronological succession in...
  10. megalodon

    Arsenopyrite

    Arsenopyrite is an iron arsenic sulfide (FeAsS). It is the most abundant arsenic-bearing mineral and the primary source of arsenic metal. It is often associated with other sulfide minerals in igneous, sedimentary and metamorphic rocks. Arsenopyrite is widely distributed but is usually overlooked...
  11. megalodon

    Apatite

    Apatite is a group of phosphate minerals with similar chemical compositions and physical properties. It is often mistaken for other minerals. It has a consistent hardness and is used as an index mineral for hardness 5 in Mohs scale. Apatite forms under wide variety of conditions and is found in...
  12. megalodon

    Anhydrite

    Anhydrite is an evaporite mineral that forms due to the evaporation of sea water and occurs in sedimentary basins. The conditions of occurrence are critical as Anhydrite transforms into Gypsum by the absorption of water. This transformation is reversible with Gypsum forming Anhydrite with around...
  13. megalodon

    Andalusite and Chiastolite

    Andalusite is an Aluminosilicate index mineral which provides the conditions of formation of its host rock. It is a common metamorphic mineral and trimorphic with Kyanite and Sillimanite. They occur under different temperature-pressure regimes and are therefore rarely found together in the same...
  14. megalodon

    What is a mineral?

    A mineral or mineral species is a naturally occurring solid chemical compound. The following properties are required for a material to qualify as a mineral: Naturally occurring Inorganic Solids Definite chemical composition Orderly internal structure The study of minerals is called Mineralogy...
  15. megalodon

    Metamorphic Rocks

    The metamorphic rocks are formed due to the transformation of preexisting rocks under pressure and temperature. The process is called metamorphism. The rocks undergo alteration in mineral composition, structure, texture and physical properties. The chemical composition the rock is generally...
  16. megalodon

    Sedimentary Rocks

    Sedimentary rocks (from the Latin sedimentum, settlement) are formed by the precipitation and accumulation of mineral matter in a solution or by the compaction of plant and/or animal remains that consolidate into hard rocks. Sediments are deposited, one layer on top of the other, on the surface...
  17. megalodon

    Igneous Rocks

    Igneous rocks (from Latin ignis, fire) also named magmatic, are all those that have been formed by solidification of a rocky, hot and mobile material called magma. This process, called crystallization, results from the cooling of the minerals and the entanglement of their particles. These types...
  18. megalodon

    Diachronism

    Diachronism is a sedimentary cycle that deposits the same type of rock over time and space, resulting in different geological age in places away from each other in the same group of rocks. The basic principle of diachronism is that rock bodies "cross ages" which is nothing more than saying "it...
  19. megalodon

    Anthropocene

    The Anthropocene is a proposed geologic epoch dating from the commencement of significant human impact on the Earth's geology, ecosystems and climate. Currently, Anthropocene is not recognized as a subdivision of Geologic time scale. Definition of Anthropocene The Anthropocene defines the...
  20. megalodon

    Vug

    A vug (also called as vugh or vugg) is a cavity, void or a large pore in a rock that is usually lined with mineral precipitates. The vugs can be formed due to a variety of processes such as through faulting, folding, or collapse of a rock– and are often partially filled with secondary minerals...

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