Recent content by megalodon

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    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...
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    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...
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    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...
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    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...
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    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...
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    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...
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    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...
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    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...
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    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...
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    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...
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    How to get into paleontology as a career on geology?

    You can pursue Bachelors and Masters degree in Geology. Paleontology specialization is very rare and very few colleges offer it. Generally, people complete Masters in Geology and then do Ph.d. in Paleontology. The Biology background is helpful in studying Paleontology as the identification &...
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    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...
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    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...
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    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...
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    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...

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