On the Dyke at Crookdene (Northumberland) and its Relations to the Collywell, Tynemouth, and Morpeth Dykes

Publisher Website
Google Scholar
Abstract
Of the four dykes dealt with in this paper, only one, the Crookdene Dyke, appears not to have been investigated before, although its position is marked on the Geological Survey Map, Sheet 106 N.E. As it has many points of interest, we shall describe its mode of occurrence and properties in some detail. The other three dykes have already been investigated by Dr. Teall; what observations we have to make upon them are thus only supplementary to his work, and serve chiefly to bring out the relationships which exist among these dykes in a clearer light. It should be mentioned that Teall had already come to the conclusion that the Collywell, Tynemouth, and Morpeth Dykes fall into a distinct group, and this inference we are in a position to substantiate; the Crookdene Dyke belongs also to the same group, halving the strongest analogies to the Collywell Dyke. The field-relationships of the Collywell, Tynemouth, and Morpeth Dykes have been clearly described by Prof. Lebour. All three belong to the series which in Northumberland has a general east-and-west trend. The Crookdene Dyke also runs east and west, and for this reason, and chiefly because of its strong petrological resemblance to them, it must be classed with the dykes just mentioned. I. T he C rookdene D yke . About 16 miles west of Morpeth, in latitude 55° 8′ 35″ N., longitude 2° 2′ 45″ W., there occurs a small exposure of a basaltic dyke in the bed and banks of the Wansbeck, which is there a

This publication has 0 references indexed in Scilit: