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mudstones

mudstones Sentence Examples

  • The prevailing rocks are sandstones, mudstones and shales.

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  • To the south-east of this region a narrow outcrop of Upper Llandovery, Wenlock and Ludlow sandstones and mudstones follows, uncomformably overlying the Llandeilo and Bala rocks, and dipping conformably under the Old Red Sandstone; they extend from Newbridge-on-Wye and Builth through Llangammarch (where there are mineral springs) towards Llandovery, while a tongue of Ludlow rocks brought up by faulting extends from Erwood on the Wye for 8 m.

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  • Consisting of red sandstones, mudstones and conglomerates, they are inclined at high angles usually away from the granite massif and the encircling metamorphic rocks.

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  • calcareous mudstones and limestones are rich in fossils.

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  • In other areas mudstones have been found with microfossil plant spores and one of the later sandstones near Cheadle has fossil footprints of reptiles.

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  • In the Middle Devonian deeper water conditions have produced mudstones, thin limestones and slates which rarely yield fossils.

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  • In general, Tertiary basalts rest unconformably and in faulted contact with cretaceous greensands and limestones or dark gray, fossil-bearing Jurassic mudstones.

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  • lacustrine mudstones.

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  • The Upper Coal Measures outcrop between Halesowen and West Bromwich and largely comprise marls, red sandy mudstones and grits.

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  • Upto 6 basaltic dikes intrude into these Triassic marls and mudstones.

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  • The Waterloo mudstone Formation spans the Triassic Jurassic boundary, and comprises dark gray mudstones and shales, alternating with gray limestones.

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  • In Russia and South Africa, gently deposited mudstones and limestones suddenly give way to massive dumps of pebbles and boulders.

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  • The geology of much of the western half of Leicestershire is dominated by the red mudstones of the Triassic aged Mercia Mudstone Group.

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  • The calcareous mudstones and limestones are rich in fossils.

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  • In this area and at Lechlade, the Upper Thames Valley is floored by the gray mudstones of the overlying Upper Jurassic Oxford clay.

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  • These marine mudstones are fossiliferous representatives of the Lower Jurassic or Lias.

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  • These dark gray mudstones, gray to black shales and minor limestones contain ammonite and rare reptile fossils.

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  • mudstones of Silurian age.

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  • mudstones with thin quartzose siltstone and sandstone beds.

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  • But the Blythesdale Braystone is a small local formation, unable to supply all the wells that have been sunk; and many of the wells derive their water from the Jurassic shales and mudstones.

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  • The prevailing rocks are sandstones, mudstones and shales.

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  • To the south-east of this region a narrow outcrop of Upper Llandovery, Wenlock and Ludlow sandstones and mudstones follows, uncomformably overlying the Llandeilo and Bala rocks, and dipping conformably under the Old Red Sandstone; they extend from Newbridge-on-Wye and Builth through Llangammarch (where there are mineral springs) towards Llandovery, while a tongue of Ludlow rocks brought up by faulting extends from Erwood on the Wye for 8 m.

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  • Consisting of red sandstones, mudstones and conglomerates, they are inclined at high angles usually away from the granite massif and the encircling metamorphic rocks.

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