## GeoLogic Mapping C

Test your knowledge of various Science Olympiad events.
UTF-8 U+6211 U+662F
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### GeoLogic Mapping C

First question: Find the true dip if you measured the dip as 10.8 degrees and you were 5.8 degrees off the true dip direction.

freed2003
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### Re: GeoLogic Mapping C

10.74?
Last edited by freed2003 on October 15th, 2020, 6:38 pm, edited 1 time in total.
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Cybersecurity 3/
Codebusters 6/
Geomapping 34/
Circuitlab 77/

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### Re: GeoLogic Mapping C

freed2003 wrote:
October 14th, 2020, 8:32 pm
I had $\arctan\frac{\tan 10.8\degree}{\tan 5.8\degree} = 10.85\degree$, which could be close enough.

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Last edited by UTF-8 U+6211 U+662F on October 15th, 2020, 6:15 pm, edited 1 time in total.

freed2003
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### Re: GeoLogic Mapping C

Cool thanks

What are 3 examples of igneous intrusions and how are they different?
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### Re: GeoLogic Mapping C

freed2003 wrote:
October 15th, 2020, 6:43 pm
Cool thanks

What are 3 examples of igneous intrusions and how are they different?
Dikes: Cut across existing strata (usually) vertically
Sills: Intruded between and parallel to existing strata
Laccolith: Lens-shaped, causes uplift in the shape of a dome

Last edited by UTF-8 U+6211 U+662F on October 15th, 2020, 8:20 pm, edited 2 times in total.

freed2003
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### Re: GeoLogic Mapping C

UTF-8 U+6211 U+662F wrote:
October 15th, 2020, 8:13 pm
freed2003 wrote:
October 15th, 2020, 6:43 pm
Cool thanks

What are 3 examples of igneous intrusions and how are they different?
Dikes: Cut across existing strata (usually) vertically
Sills: Intruded between and parallel to existing strata
Laccolith: Lens-shaped, causes uplift in the shape of a dome

yessir. I believe there's also batholiths which are formed by magma intruding into a body but doesn't reach the surface?

Your turn!
BEARSO/MIT/Regionals/State?
Cybersecurity 3/
Codebusters 6/
Geomapping 34/
Circuitlab 77/

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### Re: GeoLogic Mapping C

Explain the difference between mafic and felsic minerals. How are mafic and felsic minerals formed?

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### Re: GeoLogic Mapping C

UTF-8 U+6211 U+662F wrote:
October 16th, 2020, 12:25 pm
Explain the difference between mafic and felsic minerals. How are mafic and felsic minerals formed?
Felsic and Mafic rocks are types of igneous rocks, meaning they are formed by lava/magma cooling. Mafic (wordsmash of magnesium and ferric) rocks/minerals are generally heavier, have less Silica, and contain Magnesium and Iron, and Felsic (wordsmash of feldspar and silica) rocks/minerals are lighter in weight, have more Silica, and contain the elements for Feldspar (Idon'trememberoffthetopofmyhead) and Quartz (SiO2).
"Don't eat stem, do STEM" -Me

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### Re: GeoLogic Mapping C

twoplustwoisten wrote:
October 18th, 2020, 9:28 pm
UTF-8 U+6211 U+662F wrote:
October 16th, 2020, 12:25 pm
Explain the difference between mafic and felsic minerals. How are mafic and felsic minerals formed?
Felsic and Mafic rocks are types of igneous rocks, meaning they are formed by lava/magma cooling. Mafic (wordsmash of magnesium and ferric) rocks/minerals are generally heavier, have less Silica, and contain Magnesium and Iron, and Felsic (wordsmash of feldspar and silica) rocks/minerals are lighter in weight, have more Silica, and contain the elements for Feldspar (Idon'trememberoffthetopofmyhead) and Quartz (SiO2).
Yep, your turn! (Also I said minerals in the question, but minor detail.)

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### Re: GeoLogic Mapping C

Please sort the units found in the image above from oldest to least old. bleh, words no good. Sorry!
Last edited by twoplustwoisten on October 19th, 2020, 3:10 pm, edited 1 time in total.
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