15 Questions 28 Answers 0 Followers
Questions related from Christian Ungewitter
Attached you find some pictures of a fine grained sandstone/siltstone from the Buntsandstein in Germany. What are the bright pinkish, blobby structures? How do they form? They are...
23 June 2023 2,989 9 View
I would like to know what the minimum strength of a rock has to be when I want to conduct a point load test. When rocks or indurated soils have a strength below a certain treshold they fail very...
21 November 2022 708 4 View
Is there some kind of empirical formula or some outcrop characteristics you can use to assess the duration a sandstone outcrop was subject to weathering? How big is the influence of the...
04 September 2022 6,194 4 View
Please share the links in your comments.
13 March 2022 6,733 2 View
Below you can see a picture of a sandstone from the lower Buntsandstein group in Thuringia (Germany). The grey dots are sandstone, too. They are free of carbonates.
21 February 2022 1,235 6 View
I stored some clay rock samples in a diluted salt solution (c=2,5 g NaCl/l). The duration of the storage is around two to three months. Is there a possibility that Na+ from the salt solution...
17 April 2021 1,195 4 View
The range of forms and sizes of cavities in rock is very big. Is there a classification scheme for rock cavities regarding their size and shape?
03 March 2021 4,748 3 View
My question relates to drilling in mudrock. There are numerous types of exploration drilling for rock. In some publications air is used as drilling fluid. But can air cool the drilling bit enough...
28 February 2020 4,604 3 View
I have a rock specimen and a soil specimen. During my mechanical measurements I observed that the rock reacts much faster on stress rate changes (observable by a sharp kink in the deformation...
01 October 2019 3,093 5 View
In the media you can always read that petroleum has an organic source. But I never heard a geologist ruling out a possible inorganic source for petroleum. I have the impression that there is still...
26 September 2019 2,005 22 View
I have two variables for which I want to calculate the correlation coefficient. One variable has an interval level (the values are 200, 400, 600, 800) the other has a ratio level. Is there a...
10 July 2019 8,780 3 View
I'm new to the topic and I want to have a first and broad overview on questions concerning: What is an artificial neural network? What can they do? How do they work? What types of ANNs do exist?...
27 June 2017 5,346 11 View
I would like to know if there is a measuring device to measure the lattice enthalpy of a rock or other polycrystalline materials. I know that there are different possibilities to measure the...
07 October 2016 1,232 1 View
I am searching for a good reference for osmosis from a physico-chemical/thermodynamical point of view. The publication must provide a general introduction to osmosis based on the chemical potential.
30 August 2016 2,555 2 View
Hello, I want to start a discussion about the influence of ChatGPT on the geological business and especially on writing geological/geotechnical reports. Is it possible with the current...
01 January 1970 4,965 13 View
