Read more: Northumberland's newest book and film festival set to host audience with Vera author Ann Cleeves and dinner with LJ Ross pelagic Organisms living in the body of the water, either floating (planktonic) or swimming (nektonic).

tholeiitic basalt/dolerite A type of basalt/ dolerite oversaturated in silica, so that small amounts of quartz are present. Frost, D. V. & Holliday, D. W. 1980. Geology of the country around Bellingham. Memoir of the British Geological Survey, Sheet 13, pp. x + 112. H.M.S.O., London.Neolithic people, like Native Americans of more recent times, had complex spiritual lives fundamentally different from those of the modern Western world. We may live on a very small part of the Earth’s crust, but it has had a long and eventful history. Northumberland has travelled across the globe and lain at the bottom of oceans, the ground beneath us has been buried to red-hot depths, broken apart by earthquakes, injected with molten magma and frozen under ice sheets. Only 15,000 years ago did the landscape we know today emerge. You will never look at the landscape in the same way again.” till (boulder clay) Collective term for the group of unsorted sediments laid down by direct action ofice. meltwater channel Channel cut by the action of meltwater from a glacier or from snow. Usually unrelated to the present drainage pattern. The details of routes given in this guide do not imply a right of way. Users of this guide are responsible for seeking permission where necessary to use footpaths and for access to any private land.

esker Long, sinuous, steep-sided ridge consisting of sands and gravels, formed either in an englacial tunnel or at the edge of a retreating ice sheet. concretion Spherical or ellipsoidal, more resistant mass formed by local early cementation of the sediment. They often occur regularly or irregularly spaced in layers and weather out of the softer surrounding sediment. Lunn, A. G. 1980. Quaternary. In Robson, D.A. (ed.). The geology of North East England, 48–60. Special Publication, Natural History Society of Northumbria. Newcastle upon Tyne.vein/veinlet A fracture, usually sub-vertical, which is mineralized, often with quartz or calcite. Crystals may grow from the walls towards the centre. A mineral vein normally implies the presence of ore minerals. coral A polyp or polyps (anemone-like) with a basal skeleton of calcium carbonate. Corals may be solitary or colonial, the latter varying from flat, tabular masses to clusters of branching tubes. calcite CaCO 3 Colourless or white mineral which is the main constituent oflimestone. Crystals when formed (i.e. in veins) may be tabular or prismatic.