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Is there a database of the geologic/stratigraphic units of France?
Is there a page where I can look up rock unit definitions for France similar to:
https://www.bgs.ac.uk/lexicon/home.cfm
http://www.bgr.de/app/litholex/index.php
I did some searching for this, but because of my poor French I couldn't find anything.
tobias47n9e
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Did a gamma ray burst contribute to the Ordovician mass extinction?
According to the University of California Museum of Palaontology webpage The Ordovician Period, the late Ordovician period witnessed
when Gondwana finally settled on the South Pole during the Upper Ordovician, massive glaciers formed, causing…
user889
10
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1 answer
Hypotheses about Silurian carbon isotope excursions?
The Silurian Period is now known to have undergone several significant positive $\delta^{13}C_{carb}$ excursions, namely the early Aeronian, Late Aeronian, Valgu, Ireviken, Mulde, Lau & Klonk events (see e. g. Cramer et al. 2011; Gradstein et al.…
plannapus
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10
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What visual wave behaviour help to tell if a tide is going in or out?
I have always wondered how someone could tell, by a brief observation (a few minutes at most), whether a tide is receding or advancing on a rainy day. Assuming there is no access to tide times and the ground is completely wet due to the…
user889
10
votes
3 answers
Is it feasible to use depleted oil wells for geothermal production?
There is an oil field outside my hometown. I wonder if it is feasible to use the same oil wells for geothermal production after oil production rate drops below profitable point.
George Chen
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10
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What geological processes would 'restart' subduction processes?
According to the Science Daily article Plate Tectonics May Grind To A Halt, Then Start Again (Carnegie Institution), one main aspect of the research being presented is the hypothesis that
suggests that plate tectonics may have ground to a halt at…
user889
10
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1 answer
'Late Veneer' on other planets
Is there any evidence of external material source events, like the 'Late Veneer' on other planets?
Or is this theory specific just for Earth?
Note, that this question may be related to How and why did the oceans form on Earth but not on other…
Neo
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10
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2 answers
Database of geological group or formation exposures?
Is there any sort of database that provides the locations of exposures of certain geologic groups or formations?
I ask because I have read that halite occurs in the Michigan Basin, and specifically occurs in beds of the Salina Formation (Silurian)…
Alex Petzke
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Biogenic origin of authigenic zeolites
Bohrmann et al. 1989 advanced the idea that the silicate phase from some clinoptilolites come from the diagenetic degradation of biogenic opal (from radiolarians in that case but presumably also other siliceous microfossils).
If this hypothesis is…
plannapus
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10
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How to calculate relative humidity?
I am involved in developing a weather based application which needs to calculate relative humidity and display it. I grab other weather variables like temperature, precipitation, wind speed and direction from the weather site. Is it possible to…
srini vasan
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Is the Younger Dryas associated with an extinction event?
It's often said that, while warming and cooling have happened before, what is unusual about the current anthropogenic warming is that it's happening so fast, relative to previous warming phases$^1$. This is considered to be likely to contribute to…
naught101
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10
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How to calculate flow duration curve for a set of 12 year data?
Given, discharge data alone for each month in each year, is it possible to calculate the flow duration curve? Some of the discharge values in some months were found to be 0. Do we need to consider those values?
Kavya
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What properties must a rocky body possess in order to exhibit the magnetic dynamo?
The magnetic field of the Earth is produced by the magnetic dynamo. What conditions must a rocky body possess in order to exhibit the dynamo?
Clearly, the planet's interior must not be too cold. However, Venus for example, according to Wikipedia,…
Irigi
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10
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What geological mechanisms result in the great depth of the Mariana Trench?
According to the Mariana Trench Oceanography page is at a maximum depth of
is 11,033 meters (36,201 feet)
The 'Challenger Deep' being the name of the deepest point.
I understand that it is a subduction trench, but my question is, what geological…
user889
10
votes
3 answers
How is heat transferred from the core through the mantle to the crust?
So, there are three main methods of transferring heat: radiation, convection/mass transfer, and conduction. Presumably radiation is not a major method of heat transport between the core and the crust, because it requires transparent materials (or a…
naught101
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