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GeoLogic Mapping C

Posted: October 11th, 2020, 6:23 am
by UTF-8 U+6211 U+662F
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.

Re: GeoLogic Mapping C

Posted: October 14th, 2020, 8:32 pm
by freed2003
10.74?

Re: GeoLogic Mapping C

Posted: October 15th, 2020, 6:15 pm
by UTF-8 U+6211 U+662F
freed2003 wrote: October 14th, 2020, 8:32 pm
I had , which could be close enough.
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Re: GeoLogic Mapping C

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

What are 3 examples of igneous intrusions and how are they different?

Re: GeoLogic Mapping C

Posted: October 15th, 2020, 8:13 pm
by UTF-8 U+6211 U+662F
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

Re: GeoLogic Mapping C

Posted: October 15th, 2020, 8:40 pm
by freed2003
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!

Re: GeoLogic Mapping C

Posted: October 16th, 2020, 12:25 pm
by UTF-8 U+6211 U+662F
Explain the difference between mafic and felsic minerals. How are mafic and felsic minerals formed?

Re: GeoLogic Mapping C

Posted: October 18th, 2020, 9:28 pm
by twoplustwoisten
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).

Re: GeoLogic Mapping C

Posted: October 19th, 2020, 7:55 am
by UTF-8 U+6211 U+662F
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.)

Re: GeoLogic Mapping C

Posted: October 19th, 2020, 3:08 pm
by twoplustwoisten
Image

Please sort the units found in the image above from oldest to least old. bleh, words no good. Sorry!