Geology Explained in South WalesDavid and Charles, 1973 - 211 Seiten |
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Seite 100
... bands are quite fossiliferous , especially the shale band that forms the long , inclined , exposed bed in the quarry ( X in Figure 46 ) . As one walks up this shaley slope , over fossil shells , one is of course walking on an ancient ...
... bands are quite fossiliferous , especially the shale band that forms the long , inclined , exposed bed in the quarry ( X in Figure 46 ) . As one walks up this shaley slope , over fossil shells , one is of course walking on an ancient ...
Seite 165
... bands represent brief marine incursions during the deposition of the otherwise terrestrial Coal Measures . Some measure of retreat and advance of the marine conditions is demonstrated in the exposed quarry face by the marked wedging ...
... bands represent brief marine incursions during the deposition of the otherwise terrestrial Coal Measures . Some measure of retreat and advance of the marine conditions is demonstrated in the exposed quarry face by the marked wedging ...
Seite 183
... bands is exactly the same as that in the shales . A third , compromising , idea is that both primary and secondary types of deposition have contributed to this repeated alternation in the Lias . The irregular base of several limestone bands ...
... bands is exactly the same as that in the shales . A third , compromising , idea is that both primary and secondary types of deposition have contributed to this repeated alternation in the Lias . The irregular base of several limestone bands ...
Inhalt
INTRODUCTION | 9 |
THE LAND OF ST DAVID | 21 |
FROM ANCIENT VOLCANOES TO STONEHENGE | 35 |
Urheberrecht | |
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Geology Explained in South Wales T.R. Owen,T. R. (Thomas Richard) Owen Keine Leseprobe verfügbar - 2006 |
Häufige Begriffe und Wortgruppen
Anticline ashes bands Basal Grits beds belt boulder brachiopod breccias Cambrian Carboniferous Limestone Castle cave Cefn Bryn Cennen clay cliffs Coal Measures coarse coast conglomerates coral Crinoidal Cynon dark deposits Devonian dolerite earth movements east eroded erosion exposed fault Fawr feet felspar Figure Fishguard flowing fold formed fossil fracture gabbro geological Geology Explained glacial Gower grey headland hills Ice Age igneous rocks inlet intrusions island Jurassic lamellibranchs lavas layers Lias Lower marine Mellte miles Millstone Grit mudstones Neath northern occur Old Radnor Old Red Sandstone Oolite Ordovician outcrop pebbly Pembrokeshire Pennant Sandstone Precambrian quarry quartz quartzite Red Marls Rhaetic Rhosili rhyolite ridge river River Neath road sand sea level Seamouth sediments seen shales side Silurian slates slopes South Wales Coalfield southern stone Stonehenge strata surface Swansea Valley Syncline Taff thick thrust Triassic trilobites upfold Upper village volcanic waterfall Welsh western zone