Results 81 to 90 of about 27,244 (313)
Journal of Quaternary Science, EarlyView.ABSTRACT The northern European distal cryptotephra framework is constantly developing both in terms of identification of new tephra horizons and improved age constraints for the already well‐established tephra marker horizons. However, many prehistoric tephra layers have only been dated by the radiocarbon method, with its inherent problems.
Maarit Kalliokoski +2 more
wiley +1 more source
Holocene lacustrine microfossils and environmental changes
, 1986 This review is concerned with the biostratigraphical use of the lacustrine microfossils such as diatoms, blue-green and green algae, Mallomonadaceae, Cladocera and larval insect remains preserved in lake sediments and their value as bioindicators of ...
P. Alhonen
core +1 more source
From Highlands to Henge: Refining the Provenance and Transport Pathways of Stonehenge's Altar Stone
Journal of Quaternary Science, EarlyView.ABSTRACT The Altar Stone, the 6000 kg central sandstone megalith at Stonehenge in southern England, is suggested to have originated from the Orcadian Basin in northeast Scotland, some 700 km away. However, its source location within this large basin remains unresolved and its mode of transport uncertain.
Anthony J. I. Clarke +8 more
wiley +1 more source
Vegetation cycles in a disturbed sequence around the Cobb-Mountain subchron in Catalonia
, 2008 A 52 m-long lacustrine sequence has been recovered from the basin of Bòbila-Ordis, near Banyoles (N-E Spain). The presence of Early Biharian rodent teeth (Early Pleistocene) and of a c.
Leroy, SAG
core
Journal of Quaternary Science, EarlyView.ABSTRACT This study presents a high‐resolution, multi‐proxy reconstruction of environmental and land‐use change from Lake Dojran over historical times (last 2500 years), combining pollen, biomarkers, radiocarbon dating, Ottoman taxation records and other historical data.
Alessia Masi +15 more
wiley +1 more source
, 1970 reportOil-impregnated intervals, up to 75 feet thick within a stratigraphic interval of about 250 feet in the Garden Gulch and Parachute Creek Members of the Green River Formation (Eocene), are exposed in beds that dip gently northward in the P.
Picard, M. Dane; High, Lee R. Jr.
core
Giant lacustrine pockmarks with subaqueous groundwater discharge and subsurface sediment mobilization [PDF]
, 2015 Subsurface fluid flow in oceans and lakes affects bathymetric morphology, sediment distribution, and water composition. We present newly discovered giant lacustrine pockmarks in Lake Neuchatel (up to 160m diameter and 30m deep) that rank among the ...
Gerrit Meinecke +24 more
core +1 more source
Journal of Quaternary Science, EarlyView.ABSTRACT The Aso‐3 tephra is one of the most significant widespread marker layers from the Middle to Late Pleistocene, generated by a large caldera‐forming eruption at the Aso volcano in Kyushu, southwestern Japan. Despite its importance, a distal co‐ignimbrite ash correlative has yet to be clearly identified, primarily because although volcanic glass ...
Toshinori Sasaki +6 more
wiley +1 more source
Holocene Carbon Burial in Lakes of the Uinta Mountains, Utah, USA
Quaternary, 2019 Recent research suggests that organic matter sequestered in lake sediment comprises a larger component of the global carbon cycle than once thought, yet little is known about carbon storage in mountain lakes.
Jeffrey Munroe, Quinn Brencher
doaj +1 more source
High-resolution early Mesozoic Pangean climatic transect in lacustrine environments
, 2000 Analysis of 6700 m of core from the Newark rift basin in New Jersey, USA provides a high-resolution astronomically calibrated magnetic polarity time scale for the Late Triassic and Early Jurassic spanning about 33 million years.
Olsen, Paul E., Kent, Dennis V.
core +1 more source