Earthwatcher's photos with the keyword: Silurian

A view over the small inlet of Victoria Bay near Marloes in Pembrokeshire. Slabs of Silurian age sandstones dip at about 40° to the south.

A view over the small inlet of Victoria Bay near Marloes in Pembrokeshire. Skokholm Island is visible in the distance. Slabs of Silurian age sandstones dip at about 40° to the south.

A day on the Marloes peninusla - 8 Late afternoon sunshine and low tide at Marloes Sands, Pembrokeshire, west Wales. The flat-topped feature on the left is Gateholm Island. Photo taken from the Pembrokeshire Coastal Path long distance footpath.

A day on the Marloes peninsula 1 Pembrokeshire, west Wales. Originally uploaded for the Guesswhere UK group. The distant headland is the northern coast of Skomer Island, with the small islet of the Garland Stone just to its right. Wooltack Point is the nearer visible headland and I was standing on the hillside above Haven Point, just west of Martin's Haven.

A day on the Marloes peninsula - 3 Pembrokeshire, west Wales. A view across Jack Sound towards Midland Isle and Skomer Island in the upper left. Wooltack Point is on the right, with Ramsey Island and the Saint David's peninsula just visible beyond, on the far skyline.

A day on the Marloes peninsula - 2 Pembrokeshire, west Wales. A view across Jack Sound from the western end of Wooltack Point. Skomer Island is visible in the distance, partly obscured by the smaller Midland Isle.

A day on the Marloes peninusla - 4 Pembrokeshire, west Wales. Upper Silurian sediments overlying the Skomer Volcanic Group dip to the SSE near Renny Slip. The land surface is strikingly flat - probably a Tertiary age marine erosion platform.

A day on the Marloes peninsula - 5 Pembrokeshire, west Wales. Steeply dipping beds of the Grey Sandstone Group (Silurian) are illuminated by the late afternoon sun.

A day on the Marloes peninsula - 6 Pembrokeshire, west Wales. The cliffs at Marloes Sands are illuminated by the late afternoon sun. Vertically bedded Silurian sediments include prominent beds of brown-weathering sandstone, three of which form the well known Three Chimneys just to the right of centre.

A day on the Marloes peninsula - 7 Pembrokeshire, west Wales. The cliffs at Marloes Sands are illuminated by the late afternoon sun. Vertically bedded Silurian sediments include prominent beds of brown-weathering sandstone, three of which form the well known Three Chimneys visible here.

A day on the Marloes peninsula - 8 Pembrokeshire, west Wales. The sun goes down over Gateholm Island at the end of a perfect day.

Originally uploaded for the Guesswhere UK group. This is one of the classic British angular unconformities. Horizontally bedded Carboniferous Limestone unconformably overlying Silurian greywacke siltstones dipping at about 45° This is at Foredale Quarry just south of Horton-in-Ribblesdale, North Yorkshire. Scanned from a Kodachrome transparency.

Originally uploaded for the Guesswhere UK Group. This is a view of the wave-cut platform and cliffs beneath Constitution Hill, Aberystwyth, Sîr Ceredigion. The wedge-shaped rock stack just left of centre is Craigyfulfran - Cormorant Rock, well named, as coromorants gather there to roost and breed. The rocks are part of the Aberystwyth Grits of Silurian age (Llandovery) and form a well-developed turbidite sequence of dark silty shales alternating with paler sandstones and gritstones.

Originally uploaded as a clue to a GWUK photo. This is a view of Aberystwyth Grits in the cliffs beneath Constitution Hill, Aberystwyth, Sîr Ceredigion. These rocks are of Silurian age (Llandovery) and form a well-developed turbidite sequence of dark silty shales alternating with paler sandstones and gritstones.