Alternative form of archaeological horizon [(archaeology) A common set of artefacts that identifies a culture and is found disseminated widely (usually over a number of sites, but sometimes widely over one site) but restricted to a single stratum; a layer or stratum.]
An invasion of warm water into the surface of the Pacific Ocean off the coast of Peru and Ecuador every four to seven years that causes changes in local and regional climate, associated with a positive anomaly.
Alternative letter-case form of ice age [(sciences) A period of long-term reduction in the temperature of Earth's surface and atmosphere, resulting in the presence of major polar ice sheets that reach the ocean and calve icebergs.]
A core sample removed from an ice sheet, most commonly from the polar ice caps of Antarctica, Greenland or from high mountain glaciers elsewhere, the properties of which can be used to reconstruct a climatic record of a given area.
Relating to a volcanic eruption that is neither supraglacial nor subglacial, but where the lava flow comes into direct contact with the margin of a glacier or ice sheet.
Geomorphic processes resulting from seasonal thawing of snow in areas of permafrost, the runoff from which refreezes in ice wedges and other structures.
A very cold dry-climate vegetation type consisting of mostly treeless open herbaceous vegetation, widespread during Pleistocene times at mid-latitudes of Eurasia and during some phases in North America.
A type of permafrost in the Pleistocene-age with an ice content of 50–90% by volume.
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