Tsunami from the Storegga Landslide

This is an accepted manuscript version of a book chapter published in the Encyclopedia of Complexity and Systems Science on 25 May 2019, and may be used under SpringerNature’s Terms of Use. The Version of Record can be found at https://doi.org/10.1007/978-3-642-27737-5_644-1The Storegga tsunami was generated by the Storegga landslide off the Norwegian coast about 8150 years ago. The tsunami deposits show that the coasts of Scotland, Norway, Shetland, Faroe Islands and possibly also Eastern Greenland and Denmark was inundated, and that the tsunami ran up to heights ranging from 3 to more than 20 meters above sea level of that time. The Storegga tsunami is important for two reasons: First, it shows that big tsunamis have happened along passive margins and outside of the Pacific Ocean. Second, it is the only slide-generated tsunami of a basin-wide range where the run-up has been mapped out in the field and the tsunami simulated with numerical models.acceptedVersio

Long-term development of a cultural landscape: the origins and dynamics of lowland heathland in southern England

The lowland heathlands of southern England comprise ca. 14 % of the total area of this habitat in Europe yet their history is poorly understood. This paper presents the first detailed palaeoecological evidence (combining palynological, microscopic charcoal and radiocarbon data) relating to the origin and long-term dynamics of heathland vegetation in southern England. Valley peat sites, situated on the Lower Greensand Group (coarse-grained sandstones) at Conford (Hampshire) and Hurston Warren (West Sussex) have been investigated. The sequence from Conford indicates the unusually late survival of Pinus sylvestris (to as late as ca. 6050 cal. B.P.) in southern England. This is attributed to edaphic factors and, after ca. 7050 cal. B.P., to frequent fires. After intervening phases of dominance by deciduous woodland, heathland vegetation became established in the proximity of both sites in the Late Bronze Age (ca. 3000 cal. B.P.) with increases in indicators of grazing and burning demonstrating an association between the development of heathland and human activity. Thereafter, the pollen and charcoal records show that the vegetation remained in a dynamic state as the scale and nature of human activity varied through time. Major expansions in the extent of heathland occurred relatively recently; after ca. 1450 cal. B.P. at Hurston Warren and after ca. 850 cal. B.P. at Conford. A review of the palaeoecological evidence suggests that the most intense use and greatest coverage of heathland in southern England probably occurred during the medieval to post-medieval periods