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Earth Science
Kurt Hikes's user avatar
Kurt Hikes's user avatar
Kurt Hikes's user avatar
Kurt Hikes
  • Member for 4 years, 3 months
  • Last seen this week
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Top posts
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question
11
From how deep in the mantle has any rock ever been brought to the surface? Have scientists found anything they believe originated in the outer core?
Oct 4, 2023
question
7
Why aren't diatoms' shells used as a temperature proxy, but foraminifera shells are?
Feb 15, 2022
question
7
Why is calcium so much more abundant in/on Earth's crust (and oceans) than it is elsewhere? (relatively speaking...)
Feb 12, 2021
question
5
Why is the inner core about 85% iron and the rest (mostly) nickel, while the outer is roughly 80%/20%, if nickel is denser than iron?
Dec 12, 2021
question
5
Why does calcium occur together with felsic rocks and magnesium with mafic rocks if calcium is denser than magnesium?
Feb 7, 2023
question
4
Can paleomagnetic techniques determine the exact direction of Earth's magnetic poles in the past, not just their polarity?
Dec 6, 2021
question
4
Why is felsic (granitic) lava so much more viscous when flowing (or trying to) than mafic (basaltic) lava?
Dec 12, 2021
question
4
Why don't most organisms use magnesium in their shells and bones if it is lighter and more common than calcium?
Jan 10
question
4
Wouldn't 'fertilizing' the ocean to increase cyanobacteria, algae and other phytoplankton populations actually INCREASE CO2 levels in the air?
Jun 26, 2021
question
4
How can the 'crystal cleavage' of apatite have a four-digit number?
Jan 8, 2021
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35
Why isn't 'chemically-strengthened glass' made with potassium carbonate to begin with?
28
Why don't (or can't) stars be more than 325 or so times the mass of the sun? What limits their size?
27
Why no proton microscopes? Proton diffraction; or proton scattering experiments? Proton crystallography?
21
Why is there so little nitrogen in the Martian and Venusian atmospheres?
21
Why doesn't dark matter clump strongly in the center of galaxies, since it doesn't feel either radiation pressure or the Pauli exclusion effect?