GeoLogic Mapping C

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Re: GeoLogic Mapping C

Post by boomvroomshroom »

What do the little c's stand for? (The book I have has Cambrian = funky C with two lines, Ordovician=O, and Devonian=D.)

Anyway...

What is the standard scale on a USGS map?
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Re: GeoLogic Mapping C

Post by Magikarpmaster629 »

1:24,000
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Re: GeoLogic Mapping C

Post by boomvroomshroom »

yep! your turn
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Re: GeoLogic Mapping C

Post by Magikarpmaster629 »

Explain the principle of original horizontality.
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Re: GeoLogic Mapping C

Post by boomvroomshroom »

Sediment deposits horizontally, chronologically, bottom to top. In other words, rock layers on the bottom are older than rock layers on top (barring any events that change the scene).
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Re: GeoLogic Mapping C

Post by Magikarpmaster629 »

Yep, go!
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Re: GeoLogic Mapping C

Post by boomvroomshroom »

LOL it's like we're the only people on this forum...

There is A) a bed of native rock, B) a dike running through it, and C) a weird patch of rock surrounding the dike, separating it from the native rock. Label A, B, and C by rock type (igneous, sedimentary, or metamorphic)?
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Re: GeoLogic Mapping C

Post by Chris_L »

A: sedimentary
B: igneous
C: metamorphic
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Re: GeoLogic Mapping C

Post by boomvroomshroom »

Correct! Your turn!
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Re: GeoLogic Mapping C

Post by Chris_L »

What does Pz stand for on a geologic map?
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