arrival | nottard of state | Ice period in Maine

Common navard terms and also definitions:

Delta: A body of sand and also gravel deposited where a stream beginning a lake or ocean and drops that sediment load. Glacially deposited deltas in Maine normally consist of two parts: (1) coarse, horizontal, frequently gravelly "topset beds" deposited in stream networks on the flat delta top, and (2) underlying, finer-grained, inclined "foreset beds" deposited on the advancing delta front. Deposit: basic term for any build-up of sediment, rocks, or other planet materials. Drumlin: An elongate, oval-shaped hill, normally composed of till, that has been shame by the circulation of glacial ice, such that its lengthy axis is parallel come the direction of ice flow. End Moraine: A ridge the sediment deposited along the margin that a glacier. Usually is composed of it rotates and/or sand and gravel in assorted proportions. Esker: A ridge that sand and also gravel deposited at the very least partly by meltwater flow in a tunnel in ~ or beneath glacial ice. Fluvial: Term provided to define river or stream-related features or processes. Fluvial deposits space sediments left by the flowing water the a stream. Glacier: A human body of ice, consisting mainly of recrystalized snow, the shows proof of downslope or external movement because of the stress of its own weight. Glaciolacustrine: Refers come sediments or processes including a lake which obtained meltwater from glacial ice. Glaciomarine: refers to sediments and processes connected to settings where maritime water and glacial ice were in contact. Grounding-line moraine: these moraines room formed listed below sea level along the ground connection line where a glacier end in the sea goes afloat.Holocene: The time period from around 10,000 years ago to the present. That is frequently used synonymously v "postglacial," due to the fact that most of brand-new England has been cost-free of glacial ice because that time. Ice age (aka: Pleistocene): The time period between 2-3 million years ago and 10,000 years ago, during which there were number of glaciations of continent proportions. Likewise called the ice cream Age. Ice Contact: ad to any type of sedimentary deposit or other function that formed nearby to glacial ice. Countless such deposits display irregular topography and also internal disturbance due to melting that the sustaining ice against which they were laid down. Kettle: A depression on the soil surface, ranging in outline from circular to really irregular, left through the melt of a massive of glacial ice cream that had actually been surrounding by glacial sediments. Countless kettles currently contain ponds or wetlands. Lacustrine: Pertaining come a lake. Late Wisconsinan: The many recent component of Pleistocene time, during which the latest continental ice sheet extended all or sections of brand-new England (approx. 25,000-10,000 year ago). Late-Glacial: refers to the time once the most recent glacial ice sheet was receding indigenous Maine, about 15,000-10,000 years ago. Moraine: general term because that sediment deposited directly from glaciers, but often supplied as short type of "end-moraine." Outwash: Sediment derived from melting glacial ice, and also deposited by meltwater streams in former of a glacier. Outwash Head: The finish of one outwash stream the was closest come the glacier. It helps to present where the end of a retreating glacier was once there are no glacial moraines. Quaternary: Term for the era between 2-3 million years earlier to the present. Contains both the Pleistocene and also Holocene. Striation: A narrow scrape on radical or a stone, developed by the abrasive action of absent debris-laden glacial ice. Submarine Fan: A somewhat fan-shaped deposit the sand and gravel that created by meltwater streams start the s at the margin that a glacier. Comparable to a delta, but was not accumulated to the water surface. Till: A heterogeneous, typically non-stratified sediment deposited directly from glacial ice.


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Particle size may selection from clay through silt, sand and gravel to huge boulders.
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