Sediment core MS27PT from the Nile delta provides a regional paleoclimate record relevant to Giza. Scientists identified three major humid periods: the Last Glacial Maximum (22.5–20.5 ka), the wet second phase of Heinrich stadial 1 (16–14.5 ka), and the early Holocene (11.5–6 ka). Heinrich stadial 1's first phase (17.5–16 ka) was dry, while the earlier glacial humid periods were colder and less humid than the Holocene. The video argues that their semi-arid conditions could account for the Sphinx's water-erosion features.
Nile delta core identifies three humid periods
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Key facts
- Marine sediment core MS27PT, recovered on the Nile margin, provides a regional paleoclimate record relevant to Giza.
- Three humid periods were identified: the Last Glacial Maximum (22.5–20.5 ka), the wet second phase of Heinrich stadial 1 (16–14.5 ka), and the early Holocene (11.5–6 ka).
- Heinrich stadial 1 had a dry first phase (17.5–16 ka) followed by a wet second phase (16–14.5 ka).
- The Last Glacial Maximum humid interval was colder and less humid than the Holocene.
- The video argues that the semi-arid conditions during earlier cold, humid periods better fit the Sphinx's water-erosion features.
Sources
Holocene climate change and its influence on early agriculture in ...researchgate.net
The freshwater algae, ferns, and fungi, associated with wet environments, indicate a wetter climate setting before 7.0 ka followed by a drying climate towards ...
Sediment core reveals 10,800 years of precipitation history in the ...phys.org
The last of these so-called African Humid Periods occurred between 14,800 and 5,500 years ago. It is known from geological and archaeological ...
Co-variations of climate and silicate weathering in the Nile Basin ...researchgate.net
The reliability of the sediment core MS27PT in monitoring past Nile ... Our study is based on three sediment cores spanning the last 10 thousand years (10 ...
[PDF] Deoxygenation dynamics on the western Nile deep-sea fan duringcp.copernicus.org
Ocean deoxygenation is a rising threat to marine ecosystems and food resources under present climate warming. 17 conditions. Organic-rich sapropel layers ...
nile river basin: Topics by Science.govscience.gov
This report provides a comprehensive analysis of the state of surface-water/groundwater interaction from the headwater to the Nile Delta region. Piezometric and ...
Abrupt response of chemical weathering to Late ...vliz.be
by L Bastian · Cited by 77 — In core MS27PT sediments, during the last 32 kyrs, clay Li concentrations are high (51 ± 18 ppm) compared to igneous rocks (6 ppm in basalts ...
100000 Years of African monsoon variability recorded in ...sciencedirect.com
by M Revel · 2010 · Cited by 315 — Sediment core MS27PT. Gravity core MS27PT (N31°47′90; E29°27′70; water depth 1389 m; 7 m length) was recovered during the 2004 Mediflux-MIMES oceanographic ...
100000 Years of African monsoon variability recorded in ...citeseerx.ist.psu.edu
by M Revel · 2010 · Cited by 306 — This paper presents results from a multi-proxy study performed on hemipelagic sediments of core MS27PT recovered on the Nile margin in 1389 m water depth (Fig.
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