Geologic Mapping C

[Magikarpmaster629]

Place the following in approximate chronological order :
-Rodinia
-Ur
-Pangea
-Pannotia
-Hudsonland
Bonus : where does Rodinia get its name?

Well (Click to Show Hidden Text)

Ur, Hudsonland (columbia), Rodinia, Pannotia, Pangea

[Rob101101]

Yes, continue!

[Magikarpmaster629]

1. What kind of geologic structure is this?
2. Briefly describe how it is formed.

[Rob101101]

1. What kind of geologic structure is this?
2. Briefly describe how it is formed.

Tricky! It is a

press (Click to Show Hidden Text)

Boudinage

and it forms when

press again (Click to Show Hidden Text)

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.

[Magikarpmaster629]

Tricky! It is a

press (Click to Show Hidden Text)

Boudinage

and it forms when

press again (Click to Show Hidden Text)

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?

[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.

[Rob101101]

Have I killed the thread? Someone else can give a question.

[Magikarpmaster629]

It's an (Click to Show Hidden Text)

Igneous extrusion, either a batholith or pluton. It is formed from magma rising, cooling, solidifying, then finally extruding itself above the ground surface.

[Rob101101]

It is an igneous extrusion, but specifically, it is an

specific answer (Click to Show Hidden Text)

eroded volcanic neck, the surrounding dikes & relatively vertical shape tip it off

[Rob101101]

Last week!

Using these two apparent dips, find the true dip.

Dips : 032 36* & 082 35*