Wednesday 16 January 2019

Sedgwick & Murchison: early observations on Loess in the Danube valley

Sedgwick, A., Murchison, R.I.  1832.  A sketch of the structure of the eastern Alps, with sections from the newer formations on the northern flanks of the chain, and through the Tertiary deposits of Styria etc. etc.   Transactions of the Geological Society of London (s2) 3, 301-420
with supplementary observations, sections, and a map by R.I.Murchison.

An enormous paper, and difficult to reference; we approach it via the writings of Horner and Lyell.
Horner (1836, p.460): " In the synopsis of the successive deposits in the basin of Vienna, given by Mr.Murchison, the uppermost is described to be 'Alluvial loam, called Loess, with terrestrial shells of existing species.. mixed with bones of elephants of extinct species. The average thickness of this deposit is about 60ft but at some places the thickness is much greater. Further, it is greatly expanded near Krems and St.Polten, reaching occasionally the thickness of 140ft, and having, near these places, the exact appearance of the old alluvial hillocks in the valley of the Rhine, which have been described by M.Voltz.." 
We appear to have early references to the loess in the Danube basin; in fact these might be among the earliest references to loess in the Danube basin..

Charles Lyell is in Europe in July 1835, he writes to Sedgwick: " I am reading you and Murchison on the Eastern Alps, as I am going so near your section. Your elaborate joint paper is now quite a treat. Boue has given me many Gosau fossils. He is going to live four years in Vienna, and next year to do the Balkan. My wife says, 'Give my kind regards to Mr.Sedgwick, and tell him it is dreadfully hot.'
Lyell deploys a well chosen phrase-'your elaborate joint paper; its impressive that he carried so much paper with him.  This elaborate joint paper appears to have been a bit neglected subsequently; no mention in the detailed history of Danube loess research by Markovic et al (2016)- not surprising, the material is well hidden but the 140ft thick loess at Krems deserves a mention.

The history of Danube loess research 2016.  Markovic, S.B., Fitzsimmons, K.E., Sprafke, T., Gavrilovic, D., Smalley, I.J., Jovic, V., Svircev, Z., Gavrilov, M.B., Beslin, M.  Quaternary International 399, 76-89.



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