GeoLogic Mapping C

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elephantower
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Re: GeoLogic Mapping C

Postby elephantower » December 26th, 2014, 10:19 pm

What is Bowen's Reaction Series?
[S/N]
N/A = didn't compete

2013:
Geologic Mapping: 1, 2
Designer Genes: 3, :(
Astronomy: N/A, :(
2014:
Geologic Mapping: 1, N/A
Protein Modelling: 1, N/A
It's About Time: 1, N/A
Forensics: 9, N/A
2015:
Geologic Mapping: 1, ?
Hydrogeology: 1, ?
It's About Time: 1, ?
Forensics: 10, ?

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boomvroomshroom
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Re: GeoLogic Mapping C

Postby boomvroomshroom » February 21st, 2015, 11:16 am

Describes what different types of minerals crystallize from different temperatures of magma. Can be used to help predict how complex the silicate structure is, and thus if they will weather faster. Typically minerals at the top are characteristic of mafic (dark, low-silica content) igneous rock.

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Magikarpmaster629
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Re: GeoLogic Mapping C

Postby Magikarpmaster629 » February 23rd, 2015, 5:00 pm

It's been a few days, I'll revive this.


A strata is layered

.....Cs/Oc/Dc.....

What is the unconformity?
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boomvroomshroom
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Re: GeoLogic Mapping C

Postby boomvroomshroom » February 23rd, 2015, 8:54 pm

but if they're all horizontal sedimentary layers, then it must be a disconformity?

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Magikarpmaster629
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Re: GeoLogic Mapping C

Postby Magikarpmaster629 » February 24th, 2015, 7:46 pm

Disconformity is right, but not for the reason I was looking for. The letters mark geologic periods, and there is a gap in time between the Ordovician (Oc) and the Devonian (Dc). Because of the gap in time, there must have been a period of time during the Silurian (between Ordovician and Devonian) where there was no deposition and much erosion, making it a disconformity. I should have made that clearer, sorry.

Your turn.
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Re: GeoLogic Mapping C

Postby boomvroomshroom » February 25th, 2015, 9:26 am

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

Postby Magikarpmaster629 » February 25th, 2015, 5:12 pm

1:24,000
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Re: GeoLogic Mapping C

Postby boomvroomshroom » February 26th, 2015, 9:44 am

yep! your turn

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Re: GeoLogic Mapping C

Postby Magikarpmaster629 » February 26th, 2015, 5:30 pm

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

Postby boomvroomshroom » February 26th, 2015, 8:35 pm

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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