Published online by Cambridge University Press: 24 August 2009
The machair coastal areas of the Outer Hebrides form one of the more distinctive coastal environments in Britain and owe their origin to an apparently unique, as yet not clearly understood, combination of factors which operated in the late postglacial period. A further distinguishing characteristic is the often quite extensive level machair grassland plain, which is suggested here as being the last of a series of evolutionary phases which took place from the time of initial sand deposition (ca 6000 B.P.) until ca 2000 B.P. There is evidence that, in a modified form, these processes may have continued right through to the present time.