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Rocks can be broken up by them being moved in quick flowing rivers or streams. If there are other rocks in there, they may hit each other and bits will come off.
It wears down the high bits (and the bits that come off fills up the low bits).
Shale that is exposed to high temperature and pressure and turned to slate is an example of the metamorphic process.
Clastic sedimentary rocks.
Clastic sedimentary rocks.
2691- Solid slate. 1290-1450- Broken slate. 1362- Pulverized slate. 2691- Solid slate. 1290-1450- Broken slate. 1362- Pulverized slate.
2691- Solid slate. 1290-1450- Broken slate. 1362- Pulverized slate. 2691- Solid slate. 1290-1450- Broken slate. 1362- Pulverized slate.
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Slate's slightly coarse texture allows bits of chalk to 'stick' to board. Its foliation (process of splitting into thin sheets) allows it to be broken or cut easily into pieces ranging from a small student chalkboard - or as big as a giant chalkboard for the teacher to write on. Slate is also very durable, although now slate chalkboards are being overtaken by 'white boards' and SmartBoards.
slate
Slate.
foliated
Meteorites come from the center of asteroids that have broken apart. They usually contain bits of metal such as copper and nickel.
it is your mom
shards
Verb, adverb, noun combination: We picked up bits of the broken glass.Noun phrase (picked is an adjective here) as object of the verb: We bagged the picked up bits of broken glass.
it breaks