What is this? any propositions?

More Zbyszek Remin's questions See All

Why the chalk is still not indurated and why it is not subjected to significant diagenesis?

Why it still possess great porosity and why it is not affected by subsequent diagenesis. At first glance it should be "easy" to change the chalk by diagenesis? Zbyszek

22 February 2016 7,985 3 View

Is there any hard evidence concerning the thickness of the Precambrian troposphere?

Simply, I’m looking for papers that gives me knowledge about any models or assumption concerning the thickness of troposphere of Early Atmosphere, e.i. during the Neo-, Meso- and...

05 March 2015 3,059 3 View

How fast do the Bryozoa disintegrate during the subaquatic transport close to Bryozoan reef complexes?

I mean how fast will they be disintegrated? How far from the Bryozoan reef will they be in less then a millimeter in size? Do you know any experiment concerning this subject? Thanks for any news....

12 November 2014 3,817 4 View

Can anybody help with identification of "mikroproblematium" from the K/T boundary?

This "things" come from the K/T boundary interval in Poland. They are 0.2-0.8mm in size. All have brown color, are polished and usually have oval shape (second photo). Some of them are elongated...

22 September 2014 7,424 12 View

Can anyone recommend a good software for presentations of core logs in sedimentary context?

I have a number of core logs with standard sedimentary descriptions: lithology, Bioturbation Index, HCl reactions, sedimentary structures, fossils occurrence, photos etc... and I need a nice...

18 August 2014 4,965 3 View

Does anyone have knowledge on the Hailstone Impression - looking for new examples?

I want to ask if anyone knows any structures from the fossil record that could be considered as hailstone impression. We have already published some from the Neoproterozoic/Cambrian transition and...

20 July 2014 3,354 6 View

Has anybody seen 2-meters long vertical structures in Upper Cretaceous deposits? And who or what made it?

These structures are in medium to thick-baded opoka facies [siliceous limestone]. They seem to be composed of the same material as the surrounding rock. Up to 10 cm in diameter and very...

02 February 2014 3,945 89 View

Greigite vs. MD magnetite - which is my major magnetic carrier?

I know that I have a MD magnetites and greigites in my samples. Is it possible to recognize which from these two minerals might be the main magnetic carrier of magnetic remanence using...

30 July 2013 5,281 9 View

Pinna bivalve - at what depth do they live most often?

I know the general ranges of depth on which Pinna can be found, but The question deals with the exact, most common depth of its life today? Is it possible to give such an exact answer? What kind...

01 January 1970 9,596 5 View

A paper on a fossil lycopod?

Dear all, Does anybody have a pdf of this paper? Wood, G.R. and Beeston, J.W., 1986. A late Permian lycopod cone Skilliostrobus sp. cf. S. australis Ash 1979 from Queensland. Geological Survey of...

07 August 2024 4,857 2 View

How can we differentiate between calcite, dolomite, siderite, magnesite and ankerite minerals in carbonatite rocks in thin section under op microscop?

How can we differentiate between calcite, dolomite, siderite, magnesite and ankerite minerals in carbonatite rocks in thin section under optical microscope?

07 August 2024 2,132 3 View

XRD Analysis is showing only Calcium carbonate. It is not showing other compounds. Can anyone help me get the other compounds?

XRD Analysis is showing only Calcium carbonate. It is not showing other compounds. Can anyone help me get the other compounds

04 August 2024 3,019 3 View

Looking for help on sem image analysis?

Hello I am conducting a microstructural analysis of a soil treated with lime. The following sem images are of the untreated s1 and treated soil s3. The untreated soil contains quartz calcite...

01 August 2024 572 0 View

What is the best practice for resuspending cell pellets during competent cell preparation (both electro and comp)?

I'm fairly new to making homemade comp cells and have done so with some mild success. What is generally an acceptable way of resuspending comp cells during wash steps? I've been told to swirl the...

31 July 2024 8,309 0 View

Are these cassettes suitable for expressing PETase mutant in E. coli?

I created two potential gene expression cassettes (constitutive and inducible) for expression of a mutant PETase gene on PeptiCloud using the version tree feature, which allows users to create...

28 July 2024 7,559 1 View

Please, what is the memory consumption of the Matlab function quad tree decomposition procedure [S = qtdecomp(I)] with respect to the input set I?

27 July 2024 5,455 2 View

What is the best method for removing paraffin from plant samples prepared for microtome?

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24 July 2024 3,087 3 View

Is it redundant to use both Random Forest and Decision Tree algorithms in the same regression project?

I am currently working on a regression model for a project and considering using both Random Forest and Decision Tree algorithms. Given that Random Forest is essentially an ensemble of Decision...

23 July 2024 4,306 3 View

A twin-shaft kiln or a rotary kiln for lime production 1 class? if compressive strength of limestone is low 60 MPa?

My research work is related to the calcination of limestone. I have a complex question and would like to consult with experts in this field. Could you please advise which kiln to choose (a...

18 July 2024 1,390 2 View

Obianuju P. Umeji

The sample is coralline limestone with fossils of solitary rugose corals. They are turned upside down. The holes are the position of columella and should be turned up. They are corals.

Marc Philippe

On the left this is no "imprint of a tree", rather the external cast of a piece of decorticated wood

Zbyszek Remin

Ok. maybe it is a pice po decorticated wood but the question is what is on the left sied of the photo?