TY - JOUR

T1 - Grain-size distribution dataset of supercritical flow sediments from a Gilbert-type delta that are associated with disaggregation bands

AU - Tanner, David C.

AU - Brandes, Christian

AU - Winsemann, Jutta

N1 - Funding Information: Sabine Mogwitz dried the samples and Sonja Riemenschneider carried out the grain-size measurements with the laser diffractometer. Jan Bergmann Barrocas contributed to creating the map. This research did not receive any specific grant from funding agencies in the public, commercial, or not-for-profit sectors.

PY - 2023/2

Y1 - 2023/2

N2 - This is a dataset of grain-size distribution in sub- and supercritical flow sediments of a Gilbert-type delta from an outcrop in North Germany. Thirteen samples of ca 2.5 kg were dried (at 105°C), and homogenised twice with a sample divider. A representative sample of 1-2 g was then analysed using laser diffraction. The grain-size distribution of the sand has a maximum between fine to medium sand, with a long fine fraction tail down to 0.06 µm and occasional coarse fractions (up to 1.5 mm) in some samples. Specific grain-size distributions correlate with the different sedimentary bedforms from which the samples were taken. This data is important for two reasons: Firstly, sedimentary structures formed by Froude supercritical flows are controlled by grain-size. However, few studies have provided grain-size datasets from the natural record, which often have a much wider grain-size distribution than experimentally-produced supercritical flow deposits. Secondly, the sands were deformed subsequently by disaggregation bands, a type of geological fault that only develops in porous granular materials, i.e. well-sorted, medium sand. The disaggregation bands are indicative of seismic or even aseismic, creeping movement of basement faults.

AB - This is a dataset of grain-size distribution in sub- and supercritical flow sediments of a Gilbert-type delta from an outcrop in North Germany. Thirteen samples of ca 2.5 kg were dried (at 105°C), and homogenised twice with a sample divider. A representative sample of 1-2 g was then analysed using laser diffraction. The grain-size distribution of the sand has a maximum between fine to medium sand, with a long fine fraction tail down to 0.06 µm and occasional coarse fractions (up to 1.5 mm) in some samples. Specific grain-size distributions correlate with the different sedimentary bedforms from which the samples were taken. This data is important for two reasons: Firstly, sedimentary structures formed by Froude supercritical flows are controlled by grain-size. However, few studies have provided grain-size datasets from the natural record, which often have a much wider grain-size distribution than experimentally-produced supercritical flow deposits. Secondly, the sands were deformed subsequently by disaggregation bands, a type of geological fault that only develops in porous granular materials, i.e. well-sorted, medium sand. The disaggregation bands are indicative of seismic or even aseismic, creeping movement of basement faults.

KW - Delta sediments

KW - Disaggregation bands

KW - Faults

KW - Grain-size

KW - Supercritical flow deposits

UR - http://www.scopus.com/inward/record.url?scp=85145667980&partnerID=8YFLogxK

U2 - 10.1016/j.dib.2022.108792

DO - 10.1016/j.dib.2022.108792

M3 - Article

AN - SCOPUS:85145667980

VL - 46

JO - Data in Brief

JF - Data in Brief

M1 - 108792

ER -