Andre
Jun8-11, 03:49 AM
The Usselo horizon is a well known dark sandy or peat layer extending from west to central Europe. It's from Allerod age and it's described well here (http://dare.uva.nl/document/125548) by some leading Dutch researchers. Unfortunately the nestor of Dutch Palaeobotany and Palynology reseach (Palaeobotany and Palynology) -specialist on the Usselo horizon - diseased last year.
Anyway, so we went on expedition to a well known moor, hunting for the Usselo horizon and we found this:
http://i55.tinypic.com/vndv1g.jpg
This was one of the last pictures taken -after sampling- but with the camera exactly horizontal so that the inclination can be measured accurately.
http://i56.tinypic.com/egvl88.jpg
The layer is about 60 mm thick at the highest point but only 20mm at the lowest point. Detail here:
http://i54.tinypic.com/zo73ie.jpg
The layers are predominantly sandy but more dense, likely mixed with clay (loam) (http://en.wikipedia.org/wiki/Loam). The nature of the dark brown color is unclear at the moment.
Anyway the usselo horizon is usually horizontal obviously and not layered (stratified), so what is it?
Anyway, so we went on expedition to a well known moor, hunting for the Usselo horizon and we found this:
http://i55.tinypic.com/vndv1g.jpg
This was one of the last pictures taken -after sampling- but with the camera exactly horizontal so that the inclination can be measured accurately.
http://i56.tinypic.com/egvl88.jpg
The layer is about 60 mm thick at the highest point but only 20mm at the lowest point. Detail here:
http://i54.tinypic.com/zo73ie.jpg
The layers are predominantly sandy but more dense, likely mixed with clay (loam) (http://en.wikipedia.org/wiki/Loam). The nature of the dark brown color is unclear at the moment.
Anyway the usselo horizon is usually horizontal obviously and not layered (stratified), so what is it?