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Nilanjan Bhowmick AIR 3, CSIR NET (Earth Science)
Shivam Sharma posted an Question
August 31, 2020 • 22:31 pm
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30 points
30 points
- CSIR NET
- Earth Sciences
An amphibolite terrane has a penetrative foliation striking n30°e and dipping 45° easterly. this is unconformably overlain by a sandstone unit whose bedding str
An amphibolite terrane has a penetrative foliation striking N30°E and dipping 45° easterly. This is unconformably overlain by a sandstone unit whose bedding strikes N45°W and dips 10" northeasterly. What is the type of unconfomity? ***** ******************************-******************** Ans: *************************************=***************--- A sulfide mineral is magnetic in nature and has black streak. The sulfur atomic proportion in the mineral is between S0-55%. ldentity the mineral. Als. group of multi-cellular, bivalved, bilaterally symmetrical, marine, benthic and inequivalved organisms proliferated during the Ordovician for the first time. Name the group. Ans: ********************** The sedimentary structure characterized by bulbous, downward-directed protuberances of a sandstone bed into the underlying mudrock horizon is called ** *************************************************************************** Ans * ******** ******
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Rahul kumar Best Answer
1. Nonconformity; Amphibolite is a metamorphic rock. Nonconformity exists between sedimentary rocks and metamorphic or igneous rocks when the sedimentary rock lies above and was deposited on the pre-existing and eroded metamorphic or igneous rock. 2. Pyrite (FeS2) Atomic proportion of sulphur in pyrite is (2 x 32)/((2 x 32) + 55.85) = 54 % Streak of pyrite is brownish black 3. Brachiopod; Brachiopod have two unequal valves with bilateral symmetry 4. Flute cast Refer to the attached figure for an image of flute cast