Geological Magazine

Công bố khoa học tiêu biểu

* Dữ liệu chỉ mang tính chất tham khảo

Sắp xếp:  
The Cretaceous Limestones of Jamaica and their Mollusca
Geological Magazine - Tập 61 Số 9 - Trang 385-410 - 1924
C. T. Trechmann
Most of the exposures of Cretaceous Limestone in Jamaica were faithfully indicated on the Geological Survey map of Sawkins and Brown in 1865. They are limited in extent and occur at certain places among the complex of the older or Blue Mountain series of rocks that project from beneath the covering of White Limestone that covers the greater part of the Island. Contrary to one's common expe...... hiện toàn bộ
The Barrettia Beds of Jamaica
Geological Magazine - Tập 59 Số 11 - Trang 501-514 - 1922
C. T. Trechmann
Barrettia, the most abnormal of the Rudistæ, and among the strangest of all the mollusca, was first found in Jamaica by Lucas Barrett, F.G.S., in the year 1861. The specimens were ably described by S. P. Woodward, F.G.S., in 1862. The original specimens, now in the British Museum of Natural History, consist of polished transverse and longitudinal sections of the ...... hiện toàn bộ
I.—A Note on the Geology of Somali-land, based on Collections made by Mrs. E. Lort-Phillips, Miss Edith Cole, and Mr. G. P. V. Aylmer
Geological Magazine - Tập 3 Số 7 - Trang 289-294 - 1896
J. W. Greǵory
Since the famous expedition of the late F. L. and W. James, of E. Lort - Phillips and G. P. V. Aylmer, in 1884–5, opened the Somali plateau to European exploration, the country has been repeatedly traversed. A valuable series of geographical memoirs, hunting journals, and bluebooks has described the main features in the topography of the country, and given many suggestions as to its geolog...... hiện toàn bộ
Pre-Caledonian granulite and gabbro enclaves in the Western Gneiss Region, Norway: indications of incomplete transition at high pressure
Geological Magazine - Tập 137 Số 3 - Trang 235-255 - 2000
Maarten Krabbendam, Alice Wain, Torgeir B. Andersen
The Western Gneiss Region of Norway is a continental terrane that experienced Caledonian high-pressure and ultrahigh-pressure metamorphism. Most rocks in this terrane show either peak-Caledonian eclogite-facies assemblages or are highly strained and equilibrated under late-Caledonian amphibolite-facies conditions. However, three kilometre-size rock bodies (Flatraket, Ulvesund and Kråke...... hiện toàn bộ
Some Problems of Physical Geology and the Earth's Thermal History
Geological Magazine - Tập 64 Số 6 - Trang 263-278 - 1927
Arthur Holmes
In a recent paper I stated that the hypothesis of a continuously cooling earth had “consistently failed to lead to any adequate explanations of fissure eruptions and other volcanic and tension phenomena, mountain-building processes and their distribution in time and space, and the alternation of marine transgressions and recessions”. It seems to be desirable that I should further justify t...... hiện toàn bộ
Plagiogranites in the Coolac ophiolite suite, New South Wales, Australia
Geological Magazine - Tập 120 Số 1 - Trang 1-20 - 1983
P. M. Ashley, B. J. Franklin, Avik Ray
SummaryPlagiogranites occur mainly as intrusive bodies and tectonic inclusions within mafic and ultramafic members of the Coolac ophiolite suite. Quartz diorites and trondhjemites appear to represent localized late-stage felsic differentiates of subalkaline tholeiitic magma, with their formation dominantly controlled by fractionation of hornblende and plagioclase. ...... hiện toàn bộ
Secular variation in Late Cretaceous carbon isotopes: a new δ13C carbonate reference curve for the Cenomanian–Campanian (99.6–70.6 Ma)
Geological Magazine - Tập 143 Số 5 - Trang 561-608 - 2006
Ian Jarvis, Andrew S. Gale, Hugh C. Jenkyns, Martin A. Pearce
Carbon stable-isotope variation through the Cenomanian–Santonian stages is characterized using data for 1769 bulk pelagic carbonate samples collected from seven Chalk successions in England. The sections show consistent stratigraphic trends and δ13C values that provide a basis for high-resolution correlation. Positive and negative δ13C excursions a...... hiện toàn bộ
The Formation of Tension Joints in Sedimentary Rocks: An Explanation
Geological Magazine - Tập 104 Số 6 - Trang 550-556 - 1967
D. W. Hobbs
AbstractA simple theoretical explanation is given for the formation of systematic tension joints in sedimentary rocks. This theory shows that the frequency of occurrence of joints in a bed of rock is dependent upon the physical properties of the rock bed, the physical properties of the surrounding rock beds, the thickness of the rock bed, and the degree of tectonic...
Relationship between joint spacing and bed thickness in sedimentary rocks: effects of interbed slip
Geological Magazine - Tập 135 Số 5 - Trang 637-655 - 1998
Shaocheng Ji, Zheming Zhu, Zichao Wang
This paper consists of three parts. The first part presents a critical review of previous mechanical models on the relationship between joint spacing (s) and bed thickness (t) in sedimentary rocks. The second part describes a new mechanical model dealing with the effects of interbed slip on joint spacing. The third part presents...... hiện toàn bộ
Asian monsoon and vegetation shift: evidence from the Siwalik succession of India
Geological Magazine - Tập 159 Số 8 - Trang 1397-1414 - 2022
Harshita Bhatia, Gaurav Srivastava, Purushottam Adhikari, Tao Su, Torsten Utescher, Khum N. Paudayal, R.C. Mehrotra
AbstractQuantitative Miocene climate and vegetation data from the Siwalik succession of western Nepal indicate that the development of the Indian summer monsoon has had an impact, though in part, on vegetation changes. The climate and vegetation of the Lower (middle Miocene) and Middle (late Miocene–Pliocene) Siwalik successions of Darjeeling, eastern Himalaya, hav...... hiện toàn bộ
Tổng số: 73   
  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 8