Boulders of baksteenkalk, on the other hand, are dropstones
which fell from melting ice floes associated with the river system known as the 'Baltischer Urstrom' or the Eridanos (Rhebergen et al.
The cobbles present within the thickest part of the peat (area of Section A) may be dropstones
derived from ice-rafting (C.
Some conglomeratic and shale levels with out-sized clasts are interpreted as dropstones
When he presented a paper in 1963 on a "Great Infra-Cambrian Glaciation" he was shot down by critics who interpreted his glacial dropstones
as products of marine mudslides.
They lack graded beds and coarse silt and sand strata that often characterize glacial lake sediments (varves) and have a low percentage of dropstones
include large rocks freed from icebergs as they melt.
1996), and Martin (1999), these clasts are interpreted as ice-rafted dropstones
6 million years ago, these cruises found evidence for a latest-Miocene to earliest-Pliocene ice advance: 4- to 6-million-year-old glacial dropstones
have been recovered from both the North Atlantic and North Pacific oceans.
Scientists have found similar dropstones
in Cretaceous deposits from the Northern Hemisphere, and the rocks also are found in sediments from other warm periods.