Identifier: quarterlyjourna601904geol (find matches)
Title: The Quarterly journal of the Geological Society of London
Year: 1845 (1840s)
Authors: Geological Society of London
Subjects: Geology
Publisher: London (etc.)
Contributing Library: Smithsonian Institution Libraries
Digitizing Sponsor: Biodiversity Heritage Library

View Book Page: Book Viewer
About This Book: Catalog Entry
View All Images: All Images From Book
Click here to view book online to see this illustration in context in a browseable online version of this book.

Text Appearing Before Image:
n a peculiar manner. In itseastern part, the contour-line of 600 feet recedes for some distanceon both sides of the river, along a depression which crosses thevalley from north-west to south-east; while the rim of the area isfrom 800 to 1000 feet above the sea, except at one place. Theriver, however, does not escape from this depression at the pointwhere the rim is lowest, but through one of the highest partsof the rim and opposite the point where it enters. Here, also,the river leaves the granite, and has cut a deep gorge through theband of indurated Culm-Measures which borders the northern sideof Dartmoor. The gorge of the Teign runs in an easterly direction for about3J miles, and the river descends about 160 feet in this distance,that is, from about 430 to 270 feet. The gorge then bends tothe south-east and continues for another 2 miles, the stream fallinganother 64 feet in that distance. Emerging from this deep andpicturesque ravine, the river takes another short turn to the east.
Text Appearing After Image:
Vol. 60.) THE VALLEY OF THE TEIGN. 321 and then bends southward to pursue a course which brings itbetween the outermost granitic ridge on the one hand, and theHaldon Hills on the other hand. Its valley here is broad andopen. Xear Chudleigh Knighton the Teign enters the plain of theBovey Eocene deposits, and flows over this to Xewton Abbot,where it receives the waters of the Bovey and the Lemmon : but,instead of continuing to run southward into Tor Bay, as the presentfeatures of the country would lead everyone to expect that it wouldhave done, it turns abruptly to the east, and enters the gap in whichits estuary now lies. Such are the facts which have to be explained : and the problemis certainly not to be solved from a mere study of maps, nor from acursory examination of the physical features of the district. Itdoes not take long to perceive that the gap of the Teign estuary isvery probably part of an ancient river-valley, excavated before thepresent physical features of the surroundi

Note About Images