摘要:

AbstractThe paper consists of two parts, both furnishing evidence that partially consolidated basalt can chill against penetrating acid veins. This recalls work by R. E. Wilcox on a mixed lava at Gardiner River, 1944. Part I is mainly concerned with certain composite intrusions where basic margins carry quartz xenocrysts and acid interiors carry quartz phenocrysts. It is argued that basalt magma rose from a deep source through quartz‐porphyry rock, melting and incorporating contacts. Presently the quartz‐porphyry melted bodily, and, no longer penetrable, followed its basaltic forerunner into the upper world. Being cooler than the basalt, it often appreciably chilled what it did not drive forward. Part II introduces some new features into the structural interpretation of the North‐West Belt of intrusions at Slieve Gullion, and claims that these intrusions and also the ring‐dyke of earlier date have been accompanied by marked distortion of country‐rock. The granophyre of the North‐West Belt seems to be essentially earlier than the associated dolerites. These latter melt the granophyre at contact and chill against rheomorphic veins. Much of D. L. Reynolds' work from 1937 onwards is accepted, including extensive remaking of Newry Devonian granodiorite under Tertiary conditions; but certain hypotheses of surface volcanitity and deep‐seated metamorphism a

ISSN:0072-1050    

DOI:10.1002/gj.3350010602

出版商:John Wiley&Sons Ltd    

年代:1957

数据来源: WILEY

摘要:

AbstractSections temporarily exposed in pits near Chatham Street are described. They reveal a late Glacial and Postglacial peat succession resting on boulder clay and overlying the Trias.

ISSN:0072-1050    

DOI:10.1002/gj.3350010603

出版商:John Wiley&Sons Ltd    

年代:1957

数据来源: WILEY

ISSN:0072-1050    

DOI:10.1002/gj.3350010604

出版商:John Wiley&Sons Ltd    

年代:1957

数据来源: WILEY

摘要:

AbstractA deep borehole has recently been drilled in search of oil and natural gas near Croxteth Park, Liverpool. The borehole penetrated Recent and Glacial deposits and a minimum of 1,306 ft. of Permo‐Triassic sandstones before crossing the large Croxteth Fault and entering rocks of the Millstone Grit Series. Thereafter, a sequence of strata extending from almost the top of the Millstone Grit down to beds in the upper part of the Carboniferous Limestone Series has been proved for the first time in the area. The limestones have yielded a large faun

ISSN:0072-1050    

DOI:10.1002/gj.3350010605

出版商:John Wiley&Sons Ltd    

年代:1957

数据来源: WILEY

摘要:

AbstractRecent brings by the National Coal Board/Opencast Executive in the Mostyn Area have shown the presence of the Grrctrioceras listen' Marine Band some 90 feet above the Garrrioceru subcrenatm Marine Band. Faunal assemblages from these horizons are here lisred and a sketch map (Fig. 1) of the area is presented.The sigdicance of the record is noted and an earlier record of G. lisrm' near Connah's Quay referred to.

ISSN:0072-1050    

DOI:10.1002/gj.3350010606

出版商:John Wiley&Sons Ltd    

年代:1957

数据来源: WILEY

摘要:

AbstractThe upper erosion surfaces of North‐east Wales are plotted and the evolution of the drainage system is traced. A warped and wasted envelope surface of Eocene age is recognized. There is evidence of a late Miocene peneplain at an elevation ranging from 2,200 to 1,800 feet. Into this have been cut numerous valley levels of Pliocene age from which the initial drainage of the Proto‐Dee can be reconstructed and its subsequent break‐up t

ISSN:0072-1050    

DOI:10.1002/gj.3350010607

出版商:John Wiley&Sons Ltd    

年代:1957

数据来源: WILEY

ISSN:0072-1050    

DOI:10.1002/gj.3350010608

出版商:John Wiley&Sons Ltd    

年代:1957

数据来源: WILEY