Showing papers by "Sidney R. Hemming published in 2002"

TL;DR: In this article, the age of the Laschamp geomagnetic excursion at its type locality using new 14 C dates on carbonates and 40 Ar/39 Ar sanidine dates on ash layers yields an estimate of 38^41 ka.

TL;DR: In this paper, the radiogenic argon concentration (40 Ar*) from the de-carbonated A 40 Ar/ 39 Ar-based K/Ar age of 433±5 million years for H11 in V28-82 is within the range of published data from background sediments in the eastern North Atlantic, and is consistent with published results across this interval in the Driezack seamounts.

TL;DR: In this article, the authors use provenance studies of ice rafted detritus (IRD) in marine sediments, in particular 40 Ar/39 Ar ages of hornblende grains in this case, to trace the history of ice sheets in the past.