ISBN: 9780217411028

This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not … Mehr…

This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1845 edition. Excerpt: ... generally destitute of organic remains, but in a few places contains them in abundance. In order to show the identity of the fossiliferous and non-fossiliferous portions of this formation, it will be necessary to enter into some details, which may not be without interest to the geologist who considers in how much obscurity all phenomena bearing on the glacial period is still involved. Travelling from the south-west, I found no shells in the drift till I reached Montreal, which stands at the base of a mountain rising abruptly from a broad plain where the valleys of the St. Lawrence and the Ottawa meet. This mountain, which is 740 feet high above the St. Lawrence, terminates in two summits, one considerably higher than the other, and capped, as before stated, with a mass of greenstone about eighty feet thick. The subjacent beds of Silurian limestone are traversed by dykes and veins of trap. At the base of the hill, on its eastern side, in the suburbs of Montreal, we find clay and sand (rf, e, fig. 13) above 100 feet deep, in which marine shells occur. This deposit fortns a terrace which ends abruptly in the steep bank (e) facing the river-plain, and running parallel to it for three or four miles. It varies in height from 50 to 150 feet, and at its base is a low flat of more modern gravel (/), rising from ten to twenty feet above the St. Lawrence. In certain places, as at the Cdte St. Pierre, on the road from Montreal to Lachine, the surface of the terrace slopes from e to d, or towards the mountain. A good section of this modern deposit was to be seen at the Tanneries, a village in the parish of St. Henri in the Section of Montreal mountain, with shelly drift at its base. A. Silurian limestone. B. Trap or greenstone. c. Dykes of basaltic... Sir Charles Lyell, Books, History, Travels In North America, In The Years 1841-2; With Geological Observations On The United States, Canada, And Nova Scotia Volume 2 Books>History, General Books LLC<

2009, ISBN: 0217411029, Lieferbar binnen 4-6 Wochen

Internationaler Buchtitel. In englischer Sprache. Verlag: Cambridge Scholars Publishing, 186 Seiten, L=152mm, B=229mm, H=11mm, Gew.=281gr, [GR: 25500 - TB/Geschichte], [SW: - History - G… Mehr…

Internationaler Buchtitel. In englischer Sprache. Verlag: Cambridge Scholars Publishing, 186 Seiten, L=152mm, B=229mm, H=11mm, Gew.=281gr, [GR: 25500 - TB/Geschichte], [SW: - History - General History], Kartoniert/Broschiert, Klappentext: Purchase of this book includes free trial access to www.million-books.com where you can read more than a million books for free. This is an OCR edition with typos. Excerpt from book: CHAPTER XVI. Succession of Strata on the Ohio between Pomeroy and Cincinnati.?Return up the Ohio to Rockville.? Waverley Sandstone.?Cliff Limestone.?Denudation.?Blue Limestone of Cincinnati.?Lower Silurian Fossils.?Limited Proportion of Silurian Species common to Europe and America.? Great Development of Brachiopoda.?Deep Sea Formations.?Rarity of Silurian Land Plants.?Silurian Fossil Fish. Between the western extremity of the Appalachian coal field and Cincinnati, as will be seen by referring to the section given at p. 92, Vol. I., the different formations, from the Devonian to the Lower Silurian inclusive, come up to the surface in succession, being well exposed in the cliffs or steep slopes of the hills which bound the Ohio valley. I have already mentioned a fine seam of coal at Pomeroy, beneath which, farther to the westward, the lower coal- measures are seen, and at length at Portsmouth, the inferior conglomerate or millstone grit, next to which, the formation, called by the Ohio geologists the Waverley sandstone, the equivalent of the Devonian formation (No. 9, in the large map, PI. II.) makes its appearance. To this sandstone, the Upper Silurian slates and limestones (Nos. 10,11, and 13 of the map) succeed in the descending order, and lastly, at Cincinnati, the Lower Silurian groups (Nos. 14 and 15 of the map) are exhibited in the hills, and in the bed of the Ohio at low water. Having, when I came down the Ohio, made the 40 GEOLOGY OF OHIO. Chap. XVI. last part of my journey in the dark, I re-ascended the river for a hundred miles, in company with Dr. Locke, a geologist lately engaged in the State survey of Ohio, and who liberally devoted his time to aid me in my inquiries. I was desirous of seeing the rocks corresponding to the Old Red sandstone before menti...<

2009, ISBN: 0217411029, Lieferbar binnen 4-6 Wochen

Internationaler Buchtitel. In englischer Sprache. Verlag: Cambridge Scholars Publishing, 186 Seiten, L=152mm, B=229mm, H=11mm, Gew.=281gr, [GR: 25500 - TB/Geschichte], [SW: - History - G… Mehr…

Internationaler Buchtitel. In englischer Sprache. Verlag: Cambridge Scholars Publishing, 186 Seiten, L=152mm, B=229mm, H=11mm, Gew.=281gr, [GR: 25500 - TB/Geschichte], [SW: - History - General History], Kartoniert/Broschiert, Klappentext: Purchase of this book includes free trial access to www.million-books.com where you can read more than a million books for free. This is an OCR edition with typos. Excerpt from book: CHAPTER XVI. Succession of Strata on the Ohio between Pomeroy and Cincinnati.?Return up the Ohio to Rockville.? Waverley Sandstone.?Cliff Limestone.?Denudation.?Blue Limestone of Cincinnati.?Lower Silurian Fossils.?Limited Proportion of Silurian Species common to Europe and America.? Great Development of Brachiopoda.?Deep Sea Formations.?Rarity of Silurian Land Plants.?Silurian Fossil Fish. Between the western extremity of the Appalachian coal field and Cincinnati, as will be seen by referring to the section given at p. 92, Vol. I., the different formations, from the Devonian to the Lower Silurian inclusive, come up to the surface in succession, being well exposed in the cliffs or steep slopes of the hills which bound the Ohio valley. I have already mentioned a fine seam of coal at Pomeroy, beneath which, farther to the westward, the lower coal- measures are seen, and at length at Portsmouth, the inferior conglomerate or millstone grit, next to which, the formation, called by the Ohio geologists the Waverley sandstone, the equivalent of the Devonian formation (No. 9, in the large map, PI. II.) makes its appearance. To this sandstone, the Upper Silurian slates and limestones (Nos. 10,11, and 13 of the map) succeed in the descending order, and lastly, at Cincinnati, the Lower Silurian groups (Nos. 14 and 15 of the map) are exhibited in the hills, and in the bed of the Ohio at low water. Having, when I came down the Ohio, made the 40 GEOLOGY OF OHIO. Chap. XVI. last part of my journey in the dark, I re-ascended the river for a hundred miles, in company with Dr. Locke, a geologist lately engaged in the State survey of Ohio, and who liberally devoted his time to aid me in my inquiries. I was desirous of seeing the rocks corresponding to the Old Red sandstone before menti...<

ISBN: 0217411029

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