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- W563290057 abstract "Late Quaternary sediments, soils,and parent rocksin and around the Windermere North Basin are studied by modernsedimentological techniques. Tho data obtained is examinedstatistically. Till points, scattered randomly on the Sand/silt/clay triangle, were redistributed into a still later group,glaciolacustrine clays and main Windermere sediments; and acoarse fluvioglacial group which is better sorted and morerounded than the till. Fine sands, negatively skewed due tofiner admixtures, typify certain lake environments. Beachdeposits are better sorted and more rounded than the till from which they were partly derived; they are more rounded and coarser on the eastern exposed beaches than on sheltered ones; they arepositively skewed due to inefficient fluviatile saltation.Three assumptions:a. Flocculation caused real mechanical bimodality oforganic sediments.b. Spasmodic sedimentation was by underflowing turbiditycurrents during storms.c. Deposition occurred when settling (discrete or flocculated) overcame mechanical dispersal.Loss of river water impetus, and organic contentand biological activity, controlled Poet Glacial sed1mentation.The relative importance of the two main rivers has alternated.Two basic mineralogical populations formed LateQuaternary material: a)Pink Late Glacial form, nonhydrated. Post Glacial form, illite and aluminosilicates,hydrated and flocculated due to organic content and acidicenvironment (occurs up to 0.020 mm).b) Silt. Chloritic rock fragments (magnesium richripidolite, iron rich thuringite); calcite was removed from all but buried varves by Post Glacial acid corrosion.A marked change in lake sedimentation occurredwith the spread of plant growth at the end of Late Glacialtimes 11,000 years ago. Controlled erosion, flocculation, and a high organic content characterised Post Glacial reddish gyttja sedimentation. Human settlement in the last 200 years causedfurther changes: accelerated erosion due to forest removal,reducing lakewater conditions due to sewage caused strongerflocculation in the blackish surface ooze." @default.
- W563290057 created "2016-06-24" @default.
- W563290057 creator A5020412383 @default.
- W563290057 date "1964-01-01" @default.
- W563290057 modified "2023-09-23" @default.
- W563290057 title "Sedimentary studies in Lake Windermere" @default.
- W563290057 hasPublicationYear "1964" @default.
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