Welcome to the Ice Age Coast
These are not Glacial Erratics
(mostly from the Holderness Coast)
Aluminium - from used ordinance
Armoured mud balls - boulders of boulder clay with attached pebbles
Asbestos - from roofs
Augen gneiss - imported from Scandinavia as "Rock Armour"
Bones and teeth - of animals buried by farmers in their fields
Brick - brick red normally. May have what appear to be borings!
China crockery - comes with many designs including the mock Chinese"willow pattern"
Chocolate covered digestive biscuits - seen at an exposure of Basement Till at Bridlington in 2019
Coal - it may have fallen off a boat in the past or be "sea coal". Often you can find patches of small black grains of coal gathered in a sand ripple on the beach.
Calcrete - a natural concrete formed by the percolation of hard water through sediment.
Concrete - grey. May be reinforced with steel rods. May be large structures from WW II such as tank traps and pill boxes. May be coloured red or yellow when used as paving stones.
Dimension Stone - used for buildings such as this piece of carved New Red Sandstone.
Double yellow lines - No Parking on the beach!
Folded gneiss - large boulders from Scandinavia used as Rock Armour
Glass (or "sea glass" naturally frosted) - from broken bottles
Graptolites - these are fakes drawn on Welsh slate with a pencil
Green glassy slag - hard, may be vesicular (containing bubbles), about 30mm across; mistaken for "meteorites". Origin - imported from Scandinavia and gets everywhere.
Iron - wartime defenses or car parts.
Land drains - unglazed terra cotta pipes and "U" shaped channels
Larvikite - imported from Norway as "Rock Armour", (note also occurs a natural glacial erratic)
Marble - white Cararra Marble from Italy used as worktops or slabs for rolling pastry
Oolitic Limestone - probably from the Middle Jurassic of Vale of Pickering used as "Rock Armour"
Pegmatite - imported from Scandinavia as "Rock Armour"
Plastics - get everywhere (seen here attached to rusting iron)
Sewerage pipe - often grey inside with a brown glaze
Slate - dark grey Welsh slate, used as a roofing material
Tarmac - a grey breccia with a black matrix
(c) Mike Horne & Hull Geological Society 2020