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8 votes
4 answers
3k views

Why do the earth sciences use mega-annum instead of mega-year?

9 votes
4 answers
985 views

What do you call boulders of non sedimentary rock that were lithified into sandstone?

1 vote
0 answers
9 views

Is it appropriate to call trough cross-stratification a 'bedform'?

1 vote
1 answer
49 views

What useful information could an ancient "mining compass" yield?

6 votes
1 answer
311 views

Did geologists determine the age of rocks and fossils before the advent of modern scientific dating methods?

1 vote
1 answer
80 views

How do these holes form?

2 votes
0 answers
40 views

Possibility of naturally cut diamonds

1 vote
0 answers
10 views

hi, any ideas how to convert Rcd and Dst seismic data into SEGY?

2 votes
1 answer
496 views

Does this support Hapgood's Earth Crust Displacement Theory?

1 vote
1 answer
41 views

How does the caprock of aeolian landforms such as mesas, buttes and hoodoos protect the underlying soft rock?

3 votes
1 answer
174 views

The total pressure / total mass of earth's atmosphere on geological time scales

8 votes
5 answers
1k views

Round structure in southern United States

15 votes
1 answer
2k views

What causes "hydrocarbons" to take the form of petroleum versus natural gas?

1 vote
0 answers
25 views

What rock layer is beneath the Vishnu Basement Rock in the Grand Canyon?

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