First discovery of Holocene cryptotephra in Amazonia. [PDF]
Sci Rep, 2015 The use of volcanic ash layers for dating and correlation (tephrochronology) is widely applied in the study of past environmental changes. We describe the first cryptotephra (non-visible volcanic ash horizon) to be identified in the Amazon basin, which ...
Watson EJ +3 more
europepmc +9 more sources
Tephra without borders: Far-reaching clues into past explosive eruptions [PDF]
Frontiers in Earth Science, 2015 This review is intended to highlight recent exciting advances in the study of distal (>100 km from the source) tephra and cryptotephra deposits and their potential application for volcanology.
Vera ePonomareva +3 more
doaj +2 more sources
Expansion of eastern Mediterranean Middle Paleolithic into the desert region in early marine isotopic stage 5 [PDF]
Scientific Reports, 2022 Marine Isotopic Stage 5 is associated with wetter climatic conditions in the Saharo-Arabian deserts. This stage also corresponds to the establishment of Middle Paleolithic hominins and their associated material culture in two geographical provinces in ...
Omry Barzilai +10 more
doaj +2 more sources
Big grains go far: understanding the discrepancy between tephrochronology and satellite infrared measurements of volcanic ash [PDF]
Atmospheric Measurement Techniques, 2015 There is a large discrepancy between the size of volcanic ash particles measured on the ground at least 500 km from their source volcano (known as cryptotephra) and those reported by satellite remote sensing (effective radius of 0.5–9 μm; 95% of ...
J. A. Stevenson +4 more
doaj +6 more sources
Late Holocene cryptotephra and a provisional 15 000-year Bayesian age model for Cascade Lake, Alaska [PDF]
Geochronology, 2022 Multiple chronometers can be employed for dating Holocene palaeoenvironmental records, each with its own inherent strengths and weaknesses. Radiocarbon dating is one of the most widely used techniques for producing chronologies, but its application at ...
L. J. Davies +3 more
doaj +3 more sources
Identification of the Campanian Ignimbrite in the Dead Sea and consequent time-transgressive hydroclimatic shifts in the Eastern Mediterranean [PDF]
Scientific ReportsRobust chronologies and time equivalent tephra markers are essential to better understand spatial palaeoenvironmental response to past abrupt climatic changes.
Rebecca J. Kearney +10 more
doaj +2 more sources
Multiproxy quantitative paleoceanographic dataset from late Quaternary marine sediment archives in the western Ross Sea (Antarctica) [PDF]
Data in BriefThe past ice sheet dynamics and the timing of retreat events in the paleo-record in the Ross Sea is an issue still few understood. In order to contribute to this topic, we provide a multiproxy data from marine sediment archives (cores and box cores ...
Fiorenza Torricella +17 more
doaj +2 more sources
The environmental and evolutionary history of Lake Ohrid (FYROM/Albania): interim results from the SCOPSCO deep drilling project [PDF]
Biogeosciences, 2017 This study reviews and synthesises existing information generated within the SCOPSCO (Scientific Collaboration on Past Speciation Conditions in Lake Ohrid) deep drilling project.
B. Wagner +46 more
doaj +17 more sources
Visualizing tephra deposits and sedimentary processes in the marine environment: The potential of X-ray microtomography. [PDF]
Geochem Geophys Geosyst, 2015 Localized tephra deposition in marine sequences is the product of many complex primary and secondary depositional processes. These can significantly influence the potential applicability of tephra deposits as isochronous marker horizons and current ...
Griggs AJ +6 more
europepmc +4 more sources
First marine cryptotephra in Antarctica found in sediments of the western Ross Sea correlates with englacial tephras and climate records [PDF]
Scientific Reports, 2019 Ester Colizza +2 more
exaly +2 more sources