The Quarterly journal of the Geological Society of London (1913) (14804574383)

Identifier: quarterlyjourna691913geol (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:
ical Survey 1-inch maps1 clearly indicate the occurrenceof a great anticline, a continuation of the Ochil Axis, which runsin a general east-north-easterly direction, passing out to sea nearMontrose,3 where exposures of the oldest lavas may be seen.On following the coast southwards from Montrose, one meets withhigher beds in the volcanic series; these extend as far as theLunan-Bay sands, beyond which a newer and higher series of lavas 1 On the Mineralogy of the Redhead in Angus-shire Mem. Wern.Nat. Hist. Soc. vol. ii, pt. 2 (1815-18) p. 339.- Vol. i (1897) pp. 299-301. 3 The Geology of Central & Western Fife & Kinross Mem. Greol. Surv.1900 ; The Geology of Eastern Fife Mem. Geol. Surv. 1902 ; E. Campbell, Geology of S.E. Kincardineshire GgoI. Mag. dec. 5, vol. viii (1911) p. 69. 4 Forfar, Sheet 57; Arbroath, Sheet 49. 5 Sir Archibald Geikie, Ancient Volcanoes of Great Britain vol. i (1897)p. 299. Fig. 1.—Geological map of the coast, from Montroseto Fislitown of Usan. MONTROSE
Text Appearing After Image:
Euslatite-basalt. Enstatitc-olivinc-basalt-.-OTivine-basalt with olivine-phenocrysts,-Lower Old Red Sandstone sediments, including true)ecni!>loiuemtcs iuterbedded with lavas.Porphy.rite-dykes. = Vol. 69.) THE VOLCANIC ROCKS OF THE FORFARSHIRE COAST. 461 forms the promontory that juts out eastwards on the south side ofthe Bay. These lavas are succeeded by sandstones, all dippingconsistently south-eastwards. Broadly speaking-, therefore, the field-relations of these rocks arequite simple. When, however, we descend to detail, the petrologicalsimilarity of the different lava-flows, their lenticular character, asalso the lenticular character of the conglomerates and sandstoneswhich are found among them, make it very difficult to ascertainthe precise effects of the faults that frequently occur, and con-sequently to obtain a correct idea as to the order in which the lava-flows succeeded one another. The excellence and accessibility of the cliff-sections between theBed Head and Lunan Bay

Note About Images

Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.