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Tagged with field-measurements geology
2 questions
7
votes
1
answer
86
views
Will a Mohs hardness scratch pen need to be replaced or resharpened?
I am considering buying a set of Mohs hardness scratch pens (aka hardness picks). As a hobbyist the price is quite high, starting at 300 USD and upwards for a complete set. I can accept this price if ...
- 171
1
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1
answer
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Is astrochronology a proper method?
Wikipedia's definition of astrochronology is:
"Astrochronology is the dating of sedimentary units by calibration
with astronomically tuned timescales, such as Milankovic cycles,1[2]
or even ...
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