Results for: Hard-rock

Does age affect the hardness of sedimentary rocks?

  Yes. Because sedimentary rocks are often found on the surface of the earth, they are easily exposed to weathering. The longer a rock is out in the open, the softer it wi (MORE)
In Geology

What is the hardness of scoria rock?

Scoria is a volcanic igneous rock that is composed of approximately  50% silica and 10% calcium oxide and lesser contents of potash and  soda. Its hardness on the Mohs scale (MORE)

Where does Between a rock and a hard place come from?

The origin of the saying is taken from the ancient Greek mythology of "The Odyssey". In his efforts to return home, Odysseys must pass between Scylla and Charybdis. Scylla was (MORE)

Is there a Hard Rock Cafe in Virginia?

As of March 2011, there is not a HRC in the state of Virginia. Closest one is Washington D.C.
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In Geology

Why are rocks hard?

Rocks are hard because the atoms comprising the minerals which are present in rocks have formed a latticework which make them solid and very stiff. Solid, stiff objects requir (MORE)
In Science

Is Kimmeridge clay a hard or soft rock?

Kimmeridge clay is soft rock because it wears away quickly! hope i  answered your question
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What are The Best Hard Rock Bands?

Iron Maiden, soundgarden, Metallica, Motley Crue , Led Zeppelin, Deep purple, scorpians, slayer,megadeth, anthrax, guns n roses? This is a very subjective question. I would i (MORE)

What is the best hard rock group?

  It's a matter of opinion but some of the biggest ones are Led Zeppelin, AC/DC, KISS, Van Halen, Guns N' Roses etc.   It's a matter of opinion but some of the bigges (MORE)