Rock Type: sedimentary Composition: grains of sand that can be feldspar or quartz - the amount of other minerals, such as mica, depend on how much weathering has occurred. Environment: Already existing rocks are eroded and the grains are transported and sorted by rivers.
Get Price2015-09-14· Gold Deposit Class #5 Auriferous veins: Saddle Fracture. Sheeted Zone. Saddle Fault. Gold Deposit Class #6: Auriferous Lode. Stockworks. Silicified zones Intrusive Igneous Rocks: Gold Deposit Class #7: Disseminated. Stockworks. Sedimentary. Volcanic rock: Gold Deposit Class #8: Quartz pebble conglomerate Quartzite. Gold Deposit Class #9
Get PriceThorndike/Barnhart's Advanced Dictionary defines "placer" as "A deposit of sand, gravel or earth in the bed of a stream containing particles of gold or other valuable mineral." The word "geology" in the same dictionary is defined as "The features of the earth's crust in a place or region, rocks or rock
Get Price2020-02-02· Rocks under the Microscope. Some common rock types as seen under the microscope. These are photomicrographs - very thin slices of rock, seen in plane-polarised light, or between crossed polarisers, when the colours seen are produced by interference of light.
Get Price2021-07-20· It can be found near gold, silver, zinc, lead, and other types of metal deposits. where sand and mud are compressed until they form a layer of sedimentary rock on the surface of the earth. Copper ore gets trapped in oxidized zones within these types of rocks.
Get PriceGold in Igneous, Sedimentary, And Metamorphic Rocks By Robert S. Jones GEOLOGICAL SURVEY CIRCULAR 610 Washington J 969
Get PriceSedimentary Rocks Weathering, Erosion, Deposition, and Lithification Layered Rock on Mars may indicate sedimentary rock Red Beds indicate oxygenation of early Earth Importance of sedimentary rocks. • Source of many construction materials. • Sediments can store information on past climate. • Type of rock can indicate environment of deposition.
Get Price2020-07-26· Sedimentary rocks are formed from the broken remains of other rocks that become joined together. A river carries, or transports, pieces of broken rock
Get Price2015-09-14· Gold Deposit Class #5 Auriferous veins: Saddle Fracture. Sheeted Zone. Saddle Fault. Gold Deposit Class #6: Auriferous Lode. Stockworks. Silicified zones Intrusive Igneous Rocks: Gold Deposit Class #7: Disseminated. Stockworks. Sedimentary. Volcanic rock: Gold Deposit Class #8: Quartz pebble conglomerate Quartzite. Gold Deposit Class #9
Get Price2020-06-29· NCERT Solutions for Class 7 Social Science Geography Chapter 2 Inside Our Earth. Gold, petroleum and coal are examples of (a) Sedimentary rocks are formed from sediments.
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