Graham Eaton / Folded Carboniferous age sandstone and shale (Culm Measures) in plan view, deformed by compression during the Variscan or Hercynian orogeny, a geologic mountain-building event caused by Late Paleozoic...

Graham Eaton / An anticlinal fold in Carboniferous age sandstone and shales. This fold and deformation was formed by compression during the Variscan or Hercynian orogeny, a geologic mountain-building event caused by...

Graham Eaton / Folded Carboniferous age sandstones, Hartland Quay, Devon, UK, May

Graham Eaton / Folded Carboniferous age sandstone and shale (Culm Measures) deformed by compression during the Variscan or Hercynian orogeny, a geologic mountain-building event caused by Late Paleozoic continental c...

Graham Eaton / An anticline in deformed Carboniferous sandstones and shale (Culm Measures) near Bude, Cornwall, UK, March. These rocks were deformed during the Hercynian or Variscan Orogeny, a mountain building even...

Graham Eaton / Steeply dipping beds of Carboniferous age sandstone and shales (Culm measures) on the flank of a large fold. This deformation was formed by compression during the Variscan or Hercynian orogeny, a geol...

Graham Eaton / Tilted beds of sandstone and thin shales of the Carboniferous, Culm Measures (Bude Formation) Sandy Mouth near Bude, Cornwall, UK, May. The bed represent cycles of deposition associated with climate c...

Graham Eaton / Tilted beds of Carboniferous age, Culm Measures (Bude Formation) sandstone and shale, Bude, Cornwall, UK, May.

Graham Eaton / A Chevron or Kink fold anticline in Carboniferous age turbidite sediments. Bude, Cornwall, UK, may.

Graham Eaton / Tilted beds of sandstone and thin shales of the Carboniferous, Culm Measures (Bude Formation) Sandy Mouth near Bude, Cornwall, UK, May. The bed represent cycles of deposition associated with climate c...

Graham Eaton / Folded Carboniferous age sandstone and shale (Culm Measures) in plan view, deformed by compression during the Variscan or Hercynian orogeny, a geologic mountain-building event caused by Late Paleozoic...

Graham Eaton / Small extension (normal) faults within a layer of shale between two layers of more competent sandstone. Carboniferous, turbidites, Bude, Cornwall, UK, May.

Graham Eaton / Chevron recumbent folding in Carboniferous age sandstone and shale (Culm Measures), deformed by compression during the Variscan or Hercynian orogeny, a geologic mountain-building event caused by Late...

Graham Eaton / Ripple marks in a bedding plane of Carboniferous age Sandstone, near Bude, Cornwall, UK, March. The ripple marks show that the sandstones were deposited in water.

Graham Eaton / Small Waterfalls at Sandy Mouth beach, near Bude, Cornwall, UK, March. The rocks are steeply dipping Carboniferous age, sandstone and shale (Culm Measures).

Graham Eaton / A small waterfall at Sandy Mouth beach, near Bude, Cornwall, UK, March. The rocks are steeply dipping Carboniferous age, sandstone and shale (Culm Measures).

Graham Eaton / Tilted beds of Carboniferous age, Culm Measures (Bude Formation) Sandy Mouth, near Bude, Cornwall, UK, May

Graham Eaton / Sole marks on the underside of a bed of Carboniferous age, turbidite sandstone. Bude, Cornwall, UK, may. Sole marks are formed by flowing water or currents and can indicate the flow direction when the...

Graham Eaton / En echelon tension (or parallel) cracks in Carboniferous age turbidite sandstones, Bude, Cornwall, UK, May. The tension cracks have formed in the more competent sandstones as the rocks were folded. T...

Graham Eaton / A thrust fault in Carboniferous age Sandstones and shales (Culm Measures) at Crackington Haven, near Bude, Cornwall, March. The rocks comprise the Crackington Formation of thinly bedded turbidite sand...

Graham Eaton / A thrust fault in Carboniferous age Sandstones and shales (Culm Measures) at Crackington Haven, near Bude, Cornwall, March. The rocks comprise the Crackington Formation of thinly bedded turbidite sand...

Graham Eaton / A small relay thrust fault in steeply dipping Carboniferous age Sandstones and shales (Culm Measures) near Bude, Cornwall, March.

Graham Eaton / A box fold formed by intersecting kink folds in Carboniferous age Sandstones and Shales (Culm Measures) at Menanchrurch near Bude, Cornwall, March. The deformation of the rocks formed during the Varis...

Graham Eaton / Chevron folded Carboniferous age sandstone and shale (Culm Measures), deformed by compression during the Variscan or Hercynian orogeny, a geologic mountain-building event caused by Late Paleozoic cont...

Graham Eaton / Load casts on the underside of a sandstone bed of Carboniferous age, Culm Measures (Bude Formation), Bude, Cornwall, UK, May.

Graham Eaton / Load casts on the underside of a sandstone bed of Carboniferous age, Culm Measures (Bude Formation), Bude, Cornwall, UK, May.

Graham Eaton / A monocline fold with a minor thrust fault in Carboniferous age sandstones, Bude, Cornwall, UK, May.

Graham Eaton / Chevron recumbent folding in Carboniferous age sandstone and shale (Culm Measures), deformed by compression during the Variscan or Hercynian orogeny, a geologic mountain-building event caused by Late...

Nick Upton / Female Meadow grasshopper (Chorthippus parallelus) resting on a Meadow thistle (Cirsium dissectum) flower stem in a damp culm grassland meadow, Devon, UK, June.

Nick Upton / Wild strawberry (Fragaria vesca) with flowers and fruit in a culm grassland meadow, Devon, UK, June.

Nick Upton / Wild strawberry (Fragaria vesca) with flowers and fruit in a culm grassland meadow, Devon, UK, June.

Nick Upton / Meadow thistles (Cirsium dissectum) flowering in a damp culm grassland meadow, Devon, UK, June.

Nick Upton / Meadow thistles (Cirsium dissectum) flowering in a damp culm grassland meadow, Devon, UK, June.

Nick Upton / Meadow thistles (Cirsium dissectum) flowering in a damp culm grassland meadow, Devon, UK, June.

Nick Upton / Heath spotted orchids (Dactylorhiza maculata) flowering in a damp culm grassland meadow, Devon, UK, June.

Nick Upton / Heath spotted orchids (Dactylorhiza maculata) flowering in a damp culm grassland meadow, Devon, UK, June.

Nick Upton / Creeping forget-me-not (Myosotis secunda) flowering in a damp culm grassland meadow, Devon, UK, June.

Nick Upton / Common yellow sedge (Carex viridula subsp. oedocarpa) in damp culm grassland, Devon. UK, June.

David Woodfall / Aerial view of fields with small farms, and rough 'culm' grasslands, Somerset, England, UK, January 2014.

Graham Eaton / An synclinal fold with minor thrusting due to flexural slip. Carboniferous, Culm Measures, deformed during the Variscan or Hercynian Orogeny, Bude, Cornwall, UK. January, 2022.

John Waters / Orchid flowering spikes, probably Common Spotted Orchid (Dactylorhiza fuchsii) in Culm grassland, Devon, UK. May.

John Waters / Marsh fritillary butterfly (Euphydryas aurinia) sunning on Meadowsweet (Filipendula ulmaria) in Culm grassland, Devon, UK. May.

John Waters / Pair of Marsh fritillary butterfly (Euphydryas aurinia) mating in Culm grassland, Devon, UK. May.

Graham Eaton / An anticlinal fold with minor thrusting in carboniferous, Culm Measures geological strata formation, Bude, Cornwall, UK. January, 2022.

Graham Eaton / A small waterfall cascading over steeply dipping beds of Culm Measures sandstone and shale, near Bude, Cornwall, UK. March, 2017.

Graham Eaton / Rock formation showing vertically bedded, carboniferous, Culm Measures sandstones, on the shore, Bude, Cornwall, UK. January, 2022.

Graham Eaton / A recumbent chevron fold in Carboniferous, Culm Measures, sandstone and shale, with associated thrust faulting, Millook Haven, Cornwall, UK. January, 2022.

Graham Eaton / A recumbent chevron fold in Carboniferous, Culm Measures, sandstone and shale, with associated thrust faulting, Millook Haven, Cornwall, UK. January, 2022.

Graham Eaton / Liesegangen rings / Liesegang bands in Carboniferous, Culm Measures sandstone, Bude, Cornwall, UK. January, 2022.

Graham Eaton / Cemented joints in a vertical bed of Carboniferous, Culm Measures, sandstone, Bude, Cornwall, UK. January, 2022.

Graham Eaton / Chevron folding in Carboniferous, Culm Measures sandstone and shale, Millook Haven, Cornwall, UK. January, 2022.

Nigel Cattlin / Onion couch or false oat grass (Arrhenatherum elatius) grass weed culms scattered on the soil after rotavation