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Berlin Environmental Atlas

01.15 Engineer's Geological Map (Edition 2017)

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Sediments of the Eem Interglacial

The sediments of the Eem interglacial (humus sand, peat, gyttja, qee//Hm, Hn, F) can essentially be found only in the area of the Barnim plateau, and there mostly in the Panke Valley. They are as a rule confined to small-scale occurrence of very low thickness.

Till of the Saalian Glaciation

In the area shown, the ground moraine of the Saalian Glaciation (Warthe substage) is the oldest geological formation to a depth of 10 m. The Saale-stage till consists of weakly clayey, silty to strongly silty chalky sands, with a small proportion of gravel and stones (qs//Mg). Ice-age boulders can also be found occasionally.

Intralattice sands can also be found in the Saale-period till.

Due to its clay and silt portions, the till constitutes a binding sediment with very low water conductivity (aquitard).

Tab. 7: Physical Soil Values of the Till of the Saalian Glaciation (qs//mg)
Particle size distribution: Sand, weakly clayey, silty, partially strong silty, partially weak gravelly, some stones
Fig./group symbol as per DIN 18 196: SU - ST*
Non-uniformity U: 10 - 50
Density of damp soil ρ: 1.95 - 2.45 g/cu.cm
Dry density ρd: 1.6 - 2.1 g/cu.cm
Water content w: 5 - 15 %
Yield point wL: 0.1 - 0.5
From rolling limit wP: 0.1 - 0.2
Plasticity coefficient IP: 6 - 26
Consistency number intercity Ic: 1.2 - 2.3
Stiffness Modulus ES (σ = 0.1 - 0.3 MN/sq.m): 6 - 40 (most >20) MN/sq.m
Plasticity range: slight to medium plasticity

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