Scottish Landform Example 40: The Buchan Gravels Formation: A Remnant Deposit of a Palaeo-landscape

Autor:	Alastair M.D. Gemmell, Brice R. Rea
Rok vydání:	2009
Předmět:	geography geography.geographical_feature_category Landform Clastic rock Geography Planning and Development Inversion (geology) Geochemistry Weathering Geomorphology Unknown age Geology Earth-Surface Processes
Zdroj:	Scottish Geographical Journal. 125:182-194
ISSN:	1751-665X 1470-2541
DOI:	10.1080/14702540903066923
Popis:	The Buchan Gravels Formation (BGF) takes the form of a series of gravel deposits of intriguing age and origin in North-East Scotland. The BGF is divided into two geographically-distinct groups, the Windy Hills Gravel Member (WHGM) and the Buchan Ridge Gravel Member (BRGM). The WHGM occurs in central Buchan, and is predominantly composed of quartzite gravels considered to have been deposited by eastwardly-flowing rivers. In contrast the BRGM is found in eastern Buchan, and is composed largely of flint-rich gravels, the precise origins of which are still under debate. Both gravel members are of considerable age, judging by the number of rotted clasts they contain. In addition, both presently occupy high ground, despite seeming to have originated as water-lain deposits. Although of unknown age, the BGF members provide evidence of topographic inversion since their deposition, and quite possibly preglacial age.
Databáze:	OpenAIRE
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