scholarly journals The Silurian Okuhinotsuchi Formation and pre-Silurian granite mass in the southern Kitakami Mountains, northeast Japan

1983 ◽  
Vol 89 (2) ◽  
pp. 99-116_3 ◽  
Author(s):  
Makoto KAWAMURA
Keyword(s):  
Southern Kitakami Mountains ◽  
Granite Mass

scholarly journals On the Geology of Castle-an-Dinas Wolfram Mine

1920 ◽  
Vol 57 (8) ◽  
pp. 347-351
Author(s):  
E. H. Davison
Keyword(s):  
The North ◽  
The One ◽  
Granite Mass

THERE are two hills named Castle-an-Dinas in West Cornwall, one near Penzance and the one on which the Wolfram Mine is situated, which lies about 2 miles east of St. Columb Major and about 4 miles to the north of the St. Austell granite mass.

A discussion concerning the floor of the northwest Indian Ocean - Geophysical studies of the Seychelles Bank

1966 ◽  
Vol 259 (1099) ◽  
pp. 227-239 ◽  
Keyword(s):  
Indian Ocean ◽  
Magnetic Anomaly ◽  
Seismic Refraction ◽  
Central Area ◽  
Magnetic Anomalies ◽  
Gravity Measurements ◽  
Northern Edge ◽  
Mohorovičić Discontinuity ◽  
Granite Mass ◽  
Thick Crust

Geological studies of the islands on the Seychelles Bank, and the results of seismic refraction experiments made on the bank, are reviewed. They show that the crust is of continental type under the centre of the bank. Gravity measurements confirm that the thick crust extends to the northern edge of the bank and show that the Mohorovicic discontinuity slopes upward at an angle of about 19° under the peripheral cliff. Large narrow magnetic anomalies occurring in the central area of the bank are ascribed to minor intrusions of dolerite found in the Precambrian granites, and it is suggested that the edge of this area may mark the limit of the granite mass. Magnetic anomaly profiles of the Mascarene Ridge are similar to those over the Seychelles Bank and could result from a similar structure.

V.—Note on the Association of Cassiterite and Specular Iron in the Lodes of Dartmoor

1909 ◽  
Vol 6 (9) ◽  
pp. 402-409 ◽  
Author(s):  
Donald A. MacAlister
Keyword(s):  
The West ◽  
Granite Mass

Situated in the neighbourhood of Birch Tor, in the heart of the granite mass of Dartmoor, at an elevation of between 1300 and 1400 feet, there are a number of tin-mines which have been worked fitfully from remote peridods (Fig. 1). The region is wild and lonely, and has in a marked degree all the scenic peculiarities of the moorland districts of the west of England.

Sign in / Sign up

Export Citation Format

Share Document