%0 Journal Article
%T Geochemistry and correlation of volcanic ash beds from the Rootsik¨ıla Stage (Wenlock¨CLudlow) in the eastern Baltic
%A Tarmo Kiipli
%A Rein Einasto
%A Toivo Kallaste
%A Viiu Nestor
%J Estonian Journal of Earth Sciences
%D 2011
%I Estonian Academy Publishers
%R 10.3176/earth.2011.4.02
%X Nine altered volcanic ash samples from the shoal and lagoonal sediments of the Rootsik¨ıla Stage (Wenlock¨CLudlow boundary interval, Estonia) were analysed, compared and correlated with five samples of deep sea environments from Latvia. Volcanic ash correlations indicate that the Wenlock¨CLudlow boundary correlates with the boundary of the Viita and Kuusn mme beds, i.e., it is significantly lower than proposed earlier. The distribution of chitinozoans supports this new correlation. Geochemical data indicate subalkaline source magma of volcanic ashes with potassium dominating over sodium.
%K bentonites
%K K-bentonites
%K Wenlock
%K Ludlow
%K Silurian
%K chitinozoans
%K volcanism.
%U http://www.kirj.ee/public/Estonian_Journal_of_Earth_Sciences/2011/issue_4/earth-2011-4-207-219.pdf