Sentences with phrase «during glacial advance»

(Clearly however brief Warm periods can occur during a general glacial retreat and brief cold periods during glacial advance.)

During the glacial advance part of the charts, the lines of temps decline like stair steps in tandem with the decline in CO2 concentrations.

Derek J. Taylor, a member of the team, attributes the counterintuitive finding to the fact that pockets of the species were preserved in limited areas that remained ice - free during glacial advances.

Not exact matches

The uplift occurring here is due to present - day melting of glaciers and ice fields formed during the Little Ice Age glacial advance that occurred between 1550 A.D. and 1850 A.D.»

During the late Llanquihue glaciation, successive glacial advances culminated at the outermost moraine complex at ~ 26,000 cal BP and later at ~ 22,000 cal BP [31](Fig 1).

Term originally introduced in the late 1930s by Matthes (1939) to describe a broad interval of the late Holocene during which significant glacial advances were observed.

What is known is that during the period called Little Ice Age, global glacial were advancing, and starting around 1850, instead advancing global glacier became retreating, this trend of glacial retreat continues to the present time, but not all glaciers adding during the Little Ice Age have not yet melted.

Earlier than that, we know that human migration out of Africa and population were set back during glacials and advanced during stadials.

Data from modern ice stream beds are difficult to obtain, but where ice advanced onto continental shelves during glacial periods, extensive areas of the former bed can be imaged using modern swath sonar tools.