Observations on Some Valley Forms and Deposits in the Sani Pass Area, Lesotho

Marker, Margaret E.; Whittington, Graeme

doi:10.1080/03736245.1971.10559490

Cited by 27 publications

(27 citation statements)

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“…The Tlaeeng sedimentary sequences appear very similar to those reported from hollow sites adjacent to Sani Top (Marker and Whittington, 1971;Marker, 1994). Both Sani Top and the Tlaeeng sites lie within the Escarpment Plateau headwater drainage zone at high altitudes where dissection is less extreme.…”

Section: Discussionsupporting

confidence: 77%

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Sedimentary Sequences in the Tlaeeng Pass Area, Lesotho

Hanvey

Marker

1994

South African Geographical Journal

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Sedimentary sequences from three adjacent hollows in northern Lesotho are described. The sediments comprise a lower sequence of orange-hued gravels and diamictons, and an upper, dominantly black, organic-rich sequence which dates between 5 000 B.P. and 900 B.P. The palynological information suggests that during organic accumulation, conditions were wetter than present at these sites. Prior to 5 000 B.P., and over approximately the past 1 000 years, conditions have been drier and organic accumulation has been inhibited. The stratigraphy within the hollows, comprising younger organic-rich deposits overlying inorganic clastic deposits, indicates a marked change in sediment accumulation at approximately 5 000 B.P.This change permits climatic inferences to be drawn for this area pertaining to the late Quaternary Period.

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Section: Discussionsupporting

confidence: 77%

“…These deposits are recorded from many areas along the Great Escarpment, above 1800 m in the north and above 1600 m in the south (Harper, 1969;Hanvey, 1990;Marker, 1989;Marker and Whittington, 1971). They have not been reported from areas below these elevations.…”

Section: Discussionmentioning

confidence: 99%

Sedimentary Sequences in the Tlaeeng Pass Area, Lesotho

Hanvey

Marker

1994

South African Geographical Journal

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“…2). These thufur, which were studied in detail by Van Zinderen Bakker in 1958, have been described for Lesotho by Jacot-Guillarmod (1962, Van Zinderen Bakker (1965), Harper (1969) and Marker & Whittington (1971). Bog-hummocks a r e known from many parts of the world and cover extensive flat, boggy areas on Iceland (Thorarinsson 1951), from where the name originates (singular thufa, plural thufur).…”

Section: Climate and Periglacial Phenomenamentioning

confidence: 97%

Environment, vegetation and phytogeography of the high-altitude bogs of Lesotho

Bakker

Werger²

1974

Plant Ecol

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“…In recent years several workers have identified features which are ascribed to periglacial processes in southern Africa- Alexandre (1962) in Lesotho, Sparrow (1964Sparrow ( , ) 965, 1967) along the Natal Drakensberg, Unton (1969) in the Cape Province, Marker and Whittington (1971) in the Sani Pass area of Lesotho, and a more general treatment by Harper (1969). Most of the occurrences recorded lie south of the 29th parallel and many of them at elevations exceeding 3 000 metres.…”

Section: Introductionmentioning

confidence: 98%