The Quarterly Journal of the Geological Society of London, Volumen 81The Society, 1925 Vols. 1-108 include Proceedings of the society (separately paged, beginning with v. 30) |
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Términos y frases comunes
adult angle appear articular surface atherfieldensis Avon axial Bala bands Barrande base beds bernissartensis bone border Camptosaurus cephalon concave convex Degree dentary deposits distal district dolerite dorsal dyke east Elephas antiquus facial suture Fault fauna feet felspar fossils free cheeks furrows Garth genal spines Geol Geological glabella granites graptolitic gravel head-shield Iguanodon Laki larva larvæ later length Limestone Llandovery Llandovery rocks Lower Llandovery magma mantelli margin maxilla median Mesonacid metacranidial spines metamorphism Meting Middle Llandovery miles Moel Moel Fammau molar Monograptus mudstones occipital occur Olenellus ontogeny outcrop pairs Paradoxides parial spines pleuræ pleural spines posterior primitive procranidial spines Prof proximal pygidium Q. J. G. S. vol quarry quartz ridge Rokell River sandstones sandy sediments seen segments Series shales Sierra Leone species specimens stages suture Terrace thickness thorax tooth transverse Trilobites unconformity Upper Llandovery valley ventral vertebra Walcott Wenlock zone
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Página 49 - In most of the teeth that have hitherto been found, three longitudinal ridges traverse the outer surface of the crown, one on each side of the median primitive ridge ; these are separated from each other, and from the serrated margins of the crown by four wide and smooth longitudinal grooves. The relative width of these grooves varies in different teeth ; sometimes a fourth small longitudinal ridge is developed on the outer side of the crown.
Página 182 - ... 150 feet displacement. MINOR FAULTS: Other faults which could not be traced for any great distance, and whose influence upon the topography and stratigraphy is of minor importance, were observed at different localities over the quadrangle. In most instances the general direction of the faults is east and west or slightly north of east and south of west. In a few cases, however, cross faults at more or less right angles to the main faults were observed. DIP.
Página l - Halsemere, but his mind remained 76041—26 30 active to the last, and it was not until a few months before his death that the busy pen was allowed to rest. From early youth until old age could no longer be denied his career had been one of uninterrupted progress. When fresh from school he attracted the attention of the most eminent geologists of the time; in the profession which he chose and in the societies which he joined he rose to the highest posts; in every country he visited he won the respect...
Página xxii - To apply* the accumulated tinnual proceeds ... at the end of every three years, in providing a Gold Medal of the value of Twenty Pounds, which, with the remainder of the proceeds, is to be awarded ... to the person or persons, either male or female, and either resident in England or abroad, who shall have done well for the advancement of the science of Geology...
Página xxii - as an acknowledgment of eminent services in any department of Geology, irrespective of the receiver's country ; but he must not be older than 45 years at his last birthday, thus probably not too old for further work, and not too young to have done much.
Página 119 - In the quiet waters of such gulfs the fine sediments of the Stockdale Shales and their equivalents might well be formed, and the floating vegetation collected.
Página 120 - ... in direction of the sea currents which at times carried the weeds into the embayments, and at other times failed to do so. "The dwarf benthonic fauna is most important in the blue beds and parts of the red beds, very sparse in the green beds, and practically absent from the dark graptolitic beds. The general paucity of the benthonic fauna and the dwarf nature of the animals is not due to the muddy habitat, for there are similar muddy sediments in deposits of many ages containing abundance of...
Página 311 - Illustrations of the Fauna of the St. John Group. No. 4. On the smaller eyed Trilobites of Division I. , with a few reniarks on the species of the higher.
Página 168 - B., 1922, The Lower Palaeozoic rocks of the Llangollen District with special reference to the tectonics: Geol.
Página 702 - The Stratigraphy of the Laki Series (Lower Eocene) of parts of Sind and Baluchistan (India) ; with a Description of the Larger Foraminifera contained in those Beds.