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Berlin Environmental Atlas

01.15 Engineer's Geological Map (Edition 2017)

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Holocene Sediments

Holocene sediments (humus sand, peat, gyttja, qh//Hm, Hn, F), some with thicknesses of more than 10 m, can be found primarily in the area of the glacial spillway and the Panke Valley. They usually are in the area of former or existing watercourses or bodies of water, and are as a rule unfavourable construction land (Tab. 1 and 2).

Tab. 1: Physical Soil Values of Peat (qh//Hn)
Fig./group symbol as per DIN 18 196: HN - HZ
Organic components cf.: 17.0 - 95.0 %
Density of damp soil ρ: 0.95 - 1.75 g/cu.cm
Dry density ρd: 0.1 - 0.5 g/cu.cm
Stiffness Modulus Es (σ = 0.1 - 0.2 MN/sq.m): 0.4 - 3.0 MN /sq.m

Tab. 2: Physical Soil Values of Peat Clay (qh//F)
Fig./group symbol as per DIN 18 196: F
Organic components cf.: 3.0 - 60.0 %
Density of damp soil ρ: 1.0 - 1.8 g/cu.cm
Dry density ρd: 0.3 - 1.3 g/cu.cm
Stiffness Modulus Es (σ = 0.1 - 0.2 MN/sq.m): 0.8 - 2.7 MN/sq.m

Dunes which were blown on in the fading-away Weichselian Glaciation and in the early holocene consist of medium-sandy fine sands (qw-qh//d). They are usually few meters thick, however, also can reach altitudes over 10 meters.

Tab. 3: Physical Soil Values of Dune Sand (qw-qh//d)
Particle size distribution: Fine sand; Fine to medium sand; Medium sand: fine-sandy
Fig./group symbol as per DIN 18 196: SE
Non-uniformity U: 1.4 - 2.5
Density of damp soil ρ: 1.45 - 1.9 g/cu.cm
Dry density ρd: 1.4 - 1.85 g/cu.cm
Water content w: 2 - 6 %
Deposit density: loose

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