Alan Cannell

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Questions related from Alan Cannell

How would a long-term change in atmospheric d15N be reflected in the geological record?

Supposing that the isotopic level of d15N became heavier (say to +3%0) over a period longer than 3ka (residence of marine N), how would this be seen in old (>40Ma) global sediments? Would these...

06 June 2019 5,885 6 View

Suggestions for publishing a short outline or conference paper of the N2 essay?

Hi I am pleased to see that the topic of Ns isotopes as markers of atmospheric changes (Giant Bugs, Martian Air etc.) has attracted some attention - especially over the past weeks. A couple of...

11 November 2018 3,647 0 View

If the region studied has any chalk landscapes (non cave forming), then the text on Thermal Engineering and Frost Creep may interest.?

Many "open Air" sites appear to have suffered from Frost Creep from occupation zones that were on chalk escarpments. For MSA (cerca 50 ka) sites not subjected to glaciation, there can be vestiges...

01 January 1970 3,561 4 View