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Van148 HomeworkYuechen He 16689151
The size of:
sand: 0.05~2.00mm silt:0.002~0.05mm clay: less than0.002mm
pebble: 2~64mm cobble: 5”-6” x 5”-6” x 2.5” in average boulder: longer than 25.6 cm in diameter
Source: http://sciencelearn.org.nz/Contexts/Soil-Farming-and-Science/
Definitions:
Igneous: Rocks formed by the cooling and solidifying ofmolten materials
Paraphrase: formed by cooling down of fluid rocks with hightemperature such as lava
Metamorphic: pertaining to or exhibiting structural changeor metamorphism
Paraphrase: undergoing of resulting from change
Sedimentary: formed by the deposition of sediment, ascertain rocks
paraphrase: produced by the action of water
Glacier: an extended mass of ice formed from snow fallingand accumulating over the years and moving very slowly
paraphrase: a slowly moving mass of ice, usually moving downa mountain
River: a natural stream of water of fairly large sizeflowing in a definite course or channel or series of diverging and convergingchannels
paraphrase: a considerable amount of water flowingcontinuously in a long line
Fluvial: produced by or found in a river
paraphrase: river-related
Sedimentary structure: Current ripple: an asymmetricalripple mark formed by currents of water on the surface of sediments
paraphrase: small waves on the surface of water caused bywind or moving objects
Sedimentary structure: Dune: a sand hill or sand ridgeformed by the wind, usually in desert regions or near lakes and oceans
paraphrase: sand mountain formed by the wind
Sedimentary structure: Bedding: arrangement of sedimentaryrocks in strata
paraphrase: the formation of different layers of sediments
Glacial Till: An unstratified glacial deposit which consistsof pockets of clay, gravel, sand, silt, and boulders
paraphrase: the thin layer consisting of sand and gravel onglaciers
Source: http://dictionary.reference.com/
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