Valley-fill alluvium deposited from ca. A.D. 1400 to 1880 is widespread in tributaries of the Paria River and is largely coincident with the Little Ice Age epoch of global climate variability. Previous work showed that alluvium of this age is a mappable stratigraphic unit in many of the larger alluvial valleys of the southern Colorado Plateau. The alluvium is bounded by two disconformities resu...

2. These records principally refer to cropmarks and finds. The only upstanding remains are a henge monument at Gunthorpe 1 and some of the 6 earthworks included amongst the 24 and 14 sites which are respectively categorised as round mounds and round barrows. Evidence about landscape comes primarily from palaeoenvironmental data within deposits in river channels and alluvium which ranges from po...

[1] Subsurface flow within a single riffle of a low-gradient gravel bed stream was modeled in three dimensions using MODFLOW, a finite difference groundwater flow model. Model simulations showed that exchange flows can only occur in this low-gradient, gaining stream because of a zone of alluvial sediment around the stream that has much higher permeability than the surrounding catchment (K = 10 ...