Landslides and related phenomena on Suduroy,  the Faeroe Islands

Jørgensen, Gunni

doi:10.37570/bgsd-1978-si-10

bgsd

1978

DOI: 10.37570/bgsd-1978-si-10

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Landslides and related phenomena on Suduroy, the Faeroe Islands

Gunni Jørgensen¹

Abstract: The formation of landslides on Suduroy, the Faeroe Islands, is greatly favoured by the geological setting and the tectonic pattern of the island. Some landslides involve lavas, the coal-bearing sequence and the luff-agglomerate zone, which served as lubricating agents for the slipped masses. The biggest landslides occur along scarps with the direction NW-SE and are believed to have a relation to the lamellar zones which are characterized by closely spaced fissures. The NW-SE trend is the main tectonic directio… Show more

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1998

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Cited by 2 publications

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Rock glaciers on the Faeroe Islands, the North Atlantic

Humlum

1998

J. Quaternary Sci.

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Three sites with alleged relict rock glaciers are described from southern Faeroe Islands, in the North Atlantic Ocean. The rock glaciers represent both talus‐derived and glacier‐derived types and were most likely initiated during the late Weichselian. One of the rock glaciers apparently became unstable at some point during degradation of permafrost and was subsequently transformed by a landslide. The age of the rock glaciers are not known precisely, but a Younger Dryas age is suggested, partly by considering contemporary local equilibrium line altitudes. The climatic background for rock glacier initiation on the Faeroe Islands during the Younger Dryas is investigated, using various types of palaeoclimatic information. The potential of using relict rock glaciers in palaeoclimatic reconstructions is discussed, and their implications for estimates on air temperature, precipitation, permafrost, rock weathering and the contemporary extent of the Weichselian Faeroe Ice Cap is outlined. © 1998 John Wiley & Sons, Ltd.

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Rock glaciers on the Faeroe Islands, the North Atlantic

Humlum

1998

J. Quaternary Sci.

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Mountain climate and periglacial phenomena in the Faeroe Islands

Humlum

Christiansen

1998

Permafrost Periglac. Process.

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The location of the Faeroe Islands in a climatically unique part of the North Atlantic region provides an opportunity to register the timing and severity of late Quaternary climatic changes. These reflect the cessation and renewal of thermohaline circulation. In this context, this paper provides an introduction to the late Weichselian and Holocene periglacial geomorphology of the Faeroe Islands. It presents the most prominent periglacial phenomena together with their altitudinal and spatial distribution. Although permafrost has been absent during the Holocene, the occurrence of late Weichselian rock glaciers indicates the former presence of permafrost. The modern periglacial environment is characterized by wind action, avalanche activity, talus production, debris flows, solifluction and the development of small‐scale patterned ground. The distribution of active periglacial phenomena is analysed in relation to air and soil temperatures, measured 1995–97, at various altitudes. The altitudinal range of 250–450 m ASL represents the modern lower limit for periglacial activity, and corresponds to a mean annual air temperature of 5·0–3·5 °C. Above this altitudinal range, periglacial features such as small‐scale patterned ground and sorted stripes are widespread and plant growth is restricted. This periglacial zone extends to the top of the highlands (maximum altitude 882 m ASL). Today, the potential permafrost and glaciation levels are presumably situated 300–450 m and 150–250 m above the highest mountains, respectively. Past Holocene periglacial activity is documented by 14C accelerator mass spectrometry (AMS) dates, the 100 year temperature record from Tórshavn, statistics of whale catch and other historical records from the Faeroe Islands and neighbouring areas. © 1998 John Wiley & Sons, Ltd.

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Landslides and related phenomena on Suduroy, the Faeroe Islands

Cited by 2 publications

References 2 publications

Rock glaciers on the Faeroe Islands, the North Atlantic

Rock glaciers on the Faeroe Islands, the North Atlantic

Mountain climate and periglacial phenomena in the Faeroe Islands

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