User Oscar Lanzi - Earth Science Stack Exchange

38 votes

What is the pressure at the center of the Earth?

answered Jul 25, 2021 at 19:42

37 votes

Is it a coincidence that the circumference of the Earth in kilometers is almost $2^{12}$?

answered Apr 24, 2022 at 18:08

37 votes

Accepted

Why is geothermal heat insignificant to surface temperature?

answered Mar 16, 2023 at 23:48

17 votes

Other than tectonic activity, what can reshape a world's surface?

answered Feb 13, 2021 at 14:01

15 votes

Would hurricanes on an ocean planet continue indefinitely?

answered Aug 30, 2020 at 16:24

13 votes

Accepted

Why is Earth's density gradient a step-function, rather than smooth?

answered Dec 29, 2020 at 22:53

7 votes

How can the 'crystal cleavage' of apatite have a four-digit number?

answered Jan 10, 2021 at 11:11

6 votes

Do carbon dioxide hydrates exist in nature?

answered Jul 13, 2021 at 0:51

6 votes

Accepted

Measuring the circumference of the earth - revisited

answered Aug 7, 2020 at 10:03

6 votes

Accepted

Can serpentinite come from basalt?

answered May 14 at 12:03

5 votes

Why don't most organisms use magnesium in their shells and bones if it is lighter and more common than calcium?

answered Jan 14 at 19:32

5 votes

Can there be ice in the core because of pressure?

answered Mar 29, 2021 at 1:20

5 votes

Accepted

What would be the effect of a geostationary moon?

answered Sep 24, 2022 at 15:59

5 votes

Why does calcium occur together with felsic rocks and magnesium with mafic rocks if calcium is denser than magnesium?

answered Feb 9, 2023 at 18:27

5 votes

Accepted

What is the southernmost landmass not covered by the Antarctic Treaty?

answered Aug 21, 2021 at 10:04

4 votes

Are there minerals which are not been found on earth but which are still possible to exist?

answered Aug 7, 2022 at 21:52

4 votes

What kind of clouds did Joseph Kittinger see at 102,000 ft?

answered Apr 20, 2022 at 20:27

4 votes

Accepted

Soil metals acids and bases

answered Jun 12, 2023 at 1:58

4 votes

If the universe (and our galaxy) has about twice as many oxygen atoms as carbon ones, why does Earth have 300 times as many oxygen atoms as carbon?

answered Jun 13, 2023 at 1:53

4 votes

Accepted

The Pacific Northwest is about to endure the hottest temperatures in recorded history. What is the atmospheric setup causing it?

answered Jun 26, 2021 at 0:39

4 votes

Composition of Martian Crust

answered Jan 21, 2021 at 3:12

4 votes

How to quickly or easily prove the world is spherical?

answered Mar 16, 2023 at 20:11

4 votes

Accepted

Why does it snow in Harbin, China but not in Venice, Italy?

answered Jun 23 at 13:35

3 votes

colder after snow

answered Jan 26 at 14:18

3 votes

Accepted

Can Cirrocumulus and Cirrostratus appear at the same time?

answered May 23, 2021 at 15:59

3 votes

Why should there not be water deep (e.g. below 6 kms) in the Earth's crust?

answered Apr 16, 2021 at 0:37

3 votes

What would happen to the earth if we removed nearly all of the air?

answered Aug 12, 2021 at 23:15

3 votes

Accepted

How do subsurface oceans form under a rocky crust?

answered Aug 13, 2020 at 13:02

3 votes

Now Mars is pulsing 3 times per night in the UV, can anyone explain these waves in simple terms? Do these waves have analogies on Earth?

answered Aug 7, 2020 at 1:01

3 votes

Accepted

Are there any sulphides, sulphates, carbonates that cannot be dissolved by aqua regia?

answered Nov 22, 2020 at 15:43

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91 Answers

What is the pressure at the center of the Earth?

Is it a coincidence that the circumference of the Earth in kilometers is almost $2^{12}$?

Why is geothermal heat insignificant to surface temperature?

Other than tectonic activity, what can reshape a world's surface?

Would hurricanes on an ocean planet continue indefinitely?

Why is Earth's density gradient a step-function, rather than smooth?

How can the 'crystal cleavage' of apatite have a four-digit number?

Do carbon dioxide hydrates exist in nature?

Measuring the circumference of the earth - revisited

Can serpentinite come from basalt?

Why don't most organisms use magnesium in their shells and bones if it is lighter and more common than calcium?

Can there be ice in the core because of pressure?

What would be the effect of a geostationary moon?

Why does calcium occur together with felsic rocks and magnesium with mafic rocks if calcium is denser than magnesium?

What is the southernmost landmass not covered by the Antarctic Treaty?

Are there minerals which are not been found on earth but which are still possible to exist?

What kind of clouds did Joseph Kittinger see at 102,000 ft?

Soil metals acids and bases

If the universe (and our galaxy) has about twice as many oxygen atoms as carbon ones, why does Earth have 300 times as many oxygen atoms as carbon?

The Pacific Northwest is about to endure the hottest temperatures in recorded history. What is the atmospheric setup causing it?

Composition of Martian Crust

How to quickly or easily prove the world is spherical?

Why does it snow in Harbin, China but not in Venice, Italy?

colder after snow

Can Cirrocumulus and Cirrostratus appear at the same time?

Why should there not be water deep (e.g. below 6 kms) in the Earth's crust?

What would happen to the earth if we removed nearly all of the air?

How do subsurface oceans form under a rocky crust?

Now Mars is pulsing 3 times per night in the UV, can anyone explain these waves in simple terms? Do these waves have analogies on Earth?

Are there any sulphides, sulphates, carbonates that cannot be dissolved by aqua regia?