Unconformity, Saunton Sands
Upper Devonian Pilton Shales overlain by “Sandrock” of Upper Pleistocene

Cross bedding in “Sandrock””

Earlier beach level in shallow water marine sands
Pleistocene deposits on raised fossil platform of the Upper Devonian strata

Pink granite erratic
Either lag deposit from eroded glacial till (?Anglian) or dropstone from grounded iceberg

Discussion about erratics.....

Other activities of a non-geological nature in Croyde Bay

Stalwarts of the RGS

View of unconformity from the beach looking north-east

Head at top of the cliffs, south of Baggy Point
Solifluction slope deposits showing possible frost-crack features

Another photo of the head deposit

Clasts of bedrock and Patella sp., lithified head deposit

Towards Baggy Point

Ripple marks on bedding plane of Pilton Shales

South-west to Croyde Bay

View from Baggy Point
Thick mist!

Rapparee Cove; Ilfracombe Slates Formation, comprising Kentisbury Slates Member
Normal fault trending NW-SE

Fault gouge or breccia in disrupted sediments along the thrust plane

Slickensiding along part of fault plane

Sequence of distal turbidites in east side of cove
Cleavage developed in low grade metamorphism of Variscan orogeny

Small scale folding and saddleback structures in west side of cove

“Verity” by Damien Hirst, Ilfracombe Harbour

“Verity” by Damien Hirst, showing her innards in more detail!

History of Tunnels Beaches
Days of Victorian splendour

“Ladies' Beach”; Ilfracombe Slates Formation, comprising Kentisbury Slates Member

Compression caused by a higher grade metamorphism has sheared thin sandstone bed
Sandstone more competent than mudstone

Quartz vein interrupted by stretching and shearing exhibiting boudinage

Enthusiastic RGS-ers!

Hele Bay – our leader taking advantage of a useful bin as a table
Ilfracombe Slates Formation, Combe Martin Slates

Classic isoclinal overturned folds
Variscan fold pressure from the south

Chondrites burrows exposed on bed or foliation plane

Combe Martin Beach, marker bed, called Holey Limestone
Combe Martin had been an important area for mining, 14th to 17th centuries

Prospecting for silver; small patches of galena and zincblende
Evidence of mineralisation thought to have occurred in the Permian