Particle Analysis and Event Detection Results of the ELSA-HL2-Core Sequence 133-68 kyr BP (Drymaar west of Hoher List, West-Germany)
Abstract
Particle-size distribution histograms and statistical particle parameters of the ELSA-HL2-core sequence 66-41 m (Drymaar west of Hoher List, Eifel, Germany) are generated by using the `RADIUS particle analysis method' (RADIUS: Rapid Particle Analysis of Digital Images by Ultra-High-Resolution Scanning of Thin Sections). On the basis of these numerical datasets, sedimentation events were detected automatically by an implemented pattern identification module. The basis of the core section (66-65 m) is composed by ash- and tuff layers. During the posteruptive phase of the maar, the slopes were stabilized by rearrangements of material into the basin. In addition, homogeneous silt layers represent loess events. At a depth of 62 m annual laminated sediments (varves) point at normal lake sedimentation conditions. The section 53 - 41 m is dominated by loess deposits, which are sporadically disconnected by laminated layers. All together 78.7 % of the core sequence is undisturbed. The detected sedimentation events (ashes and turbidites) and loess sequences are basis for time correlations (,tuning') on the ELSA-HL2-core. Thus the whole sequence represents the period 133-68 kyr. The Eemian (126-116 ky) is characterized by annual laminated, organic rich sediments. The end of the Eemian respectively the beginning of stadial C25 is represented by high entries of loess over a short period.
- Publication:
-
AGU Fall Meeting Abstracts
- Pub Date:
- December 2004
- Bibcode:
- 2004AGUFMPP13A0580S
- Keywords:
-
- 0305 Aerosols and particles (0345;
- 4801)