Home/Volume-1/Mining Geology – 2 Volume-1 Mining Geology – 2 Admin02/08/20245 463 Less than a minute Report a question What's wrong with this question? You cannot submit an empty report. Please add some details. 0% Mining Geology Minerals, Rocks, Rock Structures Mining Geology - 2 1 / 28 1. Dykes are? Concordant form Phacoliths Discordant form Sills 2 / 28 2. It is an irregularity where bed thins out generally due to erosion by a river or stream and the roof of the bed is filled up with sand or other material? Washout Roll Outcrop Lacolith 3 / 28 3. The Protodyaknov strength index of the coal is? 1 1.5 2 3 4 / 28 4. Rocks which have cooled at depth had slow rate of cooling resulting in coarse crystals called? Plutonic Hypabyssal Volcanic Sedimentary 5 / 28 5. The mineral is not scratched by fluorite and scratched by Orthoclase then the hardness of the mineral is? 5 6 7 4 6 / 28 6. In bituminous coal the % of the carbon content is? Less than 50 % 50 to 70 % 70 to 90 % More than 90 % 7 / 28 7. Basalt is a? Hypabyssal rock Sedimentary rock Volcanic rock Plutonic rock 8 / 28 8. Upper Gondwana are characterized by? Glossopteris flora Cycas Philonphylum flora Rajamahal flora 9 / 28 9. Diamond crystalline system is? Hexagonal Cubic system Isometric Monoclinic 10 / 28 10. The metallic content of the ore is called? Grade Tenor Gangue None 11 / 28 11. Archean rocks are also known as? Metamorphic rocks Sedimentary rocks Igneous rocks None 12 / 28 12. The Protodyaknov strength index of the lignite is? 1 to 1.5 1.5 to 2 2 to 2.5 3 to 4 13 / 28 13. Saddle reefs are formed by? Metasomatism Hydrothermal process Sedimentation Magmatic process 14 / 28 14. Mica is a? Metallic mineral Gangue mineral Non-metallic Precipitate 15 / 28 15. Gabro is? Carbonate rock Sedimentary rock Metamorphic rock Plutonic rock 16 / 28 16. If the upper younger rocks spread covering the older rock it is known as? Unconformity Joints Inlier Overlap 17 / 28 17. Specific gravity of the earth...gm/cu.cm? 5.5 3.7 6.5 2.7 18 / 28 18. The chemical formula of the magnetite is? FeCO3 Fe2O3 Fe3O4 Fe2O4 19 / 28 19. To study bed rock lying below soil cover 1m and max 30m deep pits are made is known as? Trenching Pitting Tracing of float None 20 / 28 20. An inlier is? Spread of older rock on younger rocks Surface erosion Older rock exposed in younger rock Bend in rocks 21 / 28 21. Parent rock of mica is? Amphibole Pegmatite Orthoclase None 22 / 28 22. The surface erosion or non-deposition occurring within the sequence of rocks is? Unconformity Joints Inlier Overlap 23 / 28 23. The rocks are called acid if the silica % is? Less than 45 % 45 - 55 % 55 - 65 % More than 65 % 24 / 28 24. The rock which is predominant in the area and which contains orebody is called? Bedrock Country rock Seam Orebody 25 / 28 25. From surface to depth of 35km is called? Crust Mantle Core None 26 / 28 26. Carboniferous system falls in group? Cenozoic Mesozoic Paleozoic Azoic 27 / 28 27. The crystalline form of the quartz is? Hexagonal Monoclinic Cubic None 28 / 28 28. Dolerite is a? Hypabyssal rock Sedimentary rock Metamorphic rock Plutonic rock Your score is The average score is 53% LinkedIn Facebook Twitter 0% Admin02/08/20245 463 Less than a minute
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