Questions tagged [geologic-layers]

The tag has no usage guidance.

Filter by
Sorted by
Tagged with
13
votes
1answer
1k views

Is there a piece of upside down foreign crust in the USA?

When I studied earth science, a lecturer mentioned that one of the anomalies that earth science hasn’t been able to explain is a piece of crust in the USA. This piece of crust appeared to match very ...
8
votes
3answers
2k views

How accurate is the law of superposition?

Recently I started being more interested in the rational details of the sciences (... being often challenged about them by a creationist friend) and one of the creationist 'theories' I've encountered ...
7
votes
1answer
3k views

How is geological time divided into units?

Earth's history is divided into eons, which are divided into eras, which are divided into periods etc. Consecutive time units differ in their geology and/or fossil species. But what events are the ...
6
votes
1answer
2k views

What's the difference between the upper & lower mantle?

Recently I checked a picture about the geologic layers of the Earth, and I saw that the mantle is divided into upper and lower mantle. What's the reason of this differentiation?
5
votes
1answer
501 views

How does Vertical Electrical Sounding Work?

I recently conducted a brief training exercise with VES equipment, although it had to be called off due to rain. I can't help but wonder about the basic physics of it, why is it that increased ...
4
votes
1answer
138 views

Does iron in core have chance to come out to crust?

Is the iron in the inner core of Earth trapped forever? Are there any mechanisms that allow some iron to leave the core and come to the surface (eg: magma convention)?
3
votes
0answers
30 views

How can I figure out the time it will take different clay and silt particles to precipitate out of water

I'm attempting to water some crops on my small plot of land using water from a downhill creek. I want to pump the water uphill to a tank then use gravity fed drip irrigation. Sometimes ( usually after ...
2
votes
1answer
99 views

What produces these amazing 3D structures in Tibet?

A friend recommended I watch this Chinese language video 航拍西藏 2018 (Aerial photography in Tibet) and the HD drone video of scenery is stunning. After about 37 minutes into the video, there are shots ...
2
votes
0answers
27 views

What US State has the most complete rock record? [duplicate]

The title seems self explanatory to me. I thought about it when I was looking at a geologic map of Utah, and it seemed to include an exceptional amount of time. I mean this in the sense that there ...
1
vote
2answers
46 views

Do Earth's layers move at different speeds?

I don't have a background in Geology but this question popped in my head the other day and can't find an answer anywhere else. If I remember science class correctly, Earth's layers have different ...
1
vote
1answer
366 views

Oldest to Newest Bedrock in the USA “road trip”

I am supposed to design a road trip (using major highways) across North America. I have to design a route that starts with the oldest rock of Archean age and finishes with the youngest rock of ...
1
vote
0answers
84 views

What type of rocks are these? I haven't got a clue [closed]

I believe it might be quartz, it's white and they have brown, red and gold lines running through it: This one has gold, brown and again white quartz, I believe:
1
vote
0answers
174 views

Do reverse faults tilt the underlying layers of rocks to form an angular unconformity?

I came across this question while studying in my text book: What does the existence of strata containing a reverse fault and above them parallel strata refer to? I thought that referred to an angular ...