Rob101101 wrote:Place the following in approximate chronological order :
-Rodinia
-Ur
-Pangea
-Pannotia
-Hudsonland
Bonus : where does Rodinia get its name?
1. What kind of geologic structure is this?
2. Briefly describe how it is formed.
Re: Geologic Mapping C
Posted: January 8th, 2016, 2:27 pm
by Rob101101
Magikarpmaster629 wrote:
1. What kind of geologic structure is this?
2. Briefly describe how it is formed.
Tricky! It is a
Boudinage
and it forms when
A ridged rock layer is pulled apart and the spaces in-between are filled by less competent rock.
Have anymore obscure structures? I'd like to fill that part of the binder.
Re: Geologic Mapping C
Posted: January 8th, 2016, 3:59 pm
by Magikarpmaster629
Rob101101 wrote:
Tricky! It is a
Boudinage
and it forms when
A ridged rock layer is pulled apart and the spaces in-between are filled by less competent rock.
Have anymore obscure structures? I'd like to fill that part of the binder.
Nice, go ahead
What specifically about obscure structures?
Re: Geologic Mapping C
Posted: January 8th, 2016, 4:27 pm
by Rob101101
Perhaps obscure isn't the right word. Just any geologic structure beside the usual syncline, monocline, horst, etc.
Here's one!
What is it? How do you know?
Hint: It's made of igneous rock.
Re: Geologic Mapping C
Posted: January 20th, 2016, 3:21 pm
by Rob101101
Have I killed the thread? Someone else can give a question.
Re: Geologic Mapping C
Posted: January 21st, 2016, 4:25 pm
by Magikarpmaster629
Igneous extrusion, either a batholith or pluton. It is formed from magma rising, cooling, solidifying, then finally extruding itself above the ground surface.
Re: Geologic Mapping C
Posted: January 21st, 2016, 5:52 pm
by Rob101101
It is an igneous extrusion, but specifically, it is an
eroded volcanic neck, the surrounding dikes & relatively vertical shape tip it off
