Author: Martha S. Carr
Publisher: Forgotten Books
ISBN: 9780266892687
Category :
Languages : en
Pages : 80
Book Description
Excerpt from The District of Columbia, Its Rocks and Their Geologic History In Pleistocene time, when the glaciers on the northern part of the continent were melting, the Potomac Basin was subjected to recurrent floods. Then as the region gradually rose, the shifting waters of the old rivers carved terraces in the rocks, especially in the soft Coastal Plain beds, and deposited on the terraces new sheets of gravel, sand, and clay. The main part of the city is built on these terraces. The earliest life of which any evidence has been found in the District of Columbia existed about 100 million years ago during early Cretaceous time. Animal life of that epoch included fresh-water mollusks, turtles, crocodiles, and huge dinosaurs; among the plants were ferns, sequoia. Water-lily, and grape. Fossil remains from later deposits include various mollusks, shark teeth, and leaves of the oak, elm, sumac, holly, and blueberry. Of the mineral resources of the District of Columbia, stone has had a leading part. Gneiss and granite quarried near Rock Creek and on the banks of the Potomac above Georgetown were used in early buildings and still are employed to some degree. The extensive deposits of gravel, sand, and clay of the Coastal Plain have long been used in the manufacture of brick and terra-cotta tile and in road building. Also present in or near the District are iron ore and diatomaceous earth in the Coastal Plain area and manganese, mica, feldspar, and gold in the Piedmont area, but attempts made at various times to develop these have not been very successful, generally because of relatively low quantity or quality. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
The District of Columbia, Its Rocks and Their Geologic History (Classic Reprint)
Author: Martha S. Carr
Publisher: Forgotten Books
ISBN: 9780266892687
Category :
Languages : en
Pages : 80
Book Description
Excerpt from The District of Columbia, Its Rocks and Their Geologic History In Pleistocene time, when the glaciers on the northern part of the continent were melting, the Potomac Basin was subjected to recurrent floods. Then as the region gradually rose, the shifting waters of the old rivers carved terraces in the rocks, especially in the soft Coastal Plain beds, and deposited on the terraces new sheets of gravel, sand, and clay. The main part of the city is built on these terraces. The earliest life of which any evidence has been found in the District of Columbia existed about 100 million years ago during early Cretaceous time. Animal life of that epoch included fresh-water mollusks, turtles, crocodiles, and huge dinosaurs; among the plants were ferns, sequoia. Water-lily, and grape. Fossil remains from later deposits include various mollusks, shark teeth, and leaves of the oak, elm, sumac, holly, and blueberry. Of the mineral resources of the District of Columbia, stone has had a leading part. Gneiss and granite quarried near Rock Creek and on the banks of the Potomac above Georgetown were used in early buildings and still are employed to some degree. The extensive deposits of gravel, sand, and clay of the Coastal Plain have long been used in the manufacture of brick and terra-cotta tile and in road building. Also present in or near the District are iron ore and diatomaceous earth in the Coastal Plain area and manganese, mica, feldspar, and gold in the Piedmont area, but attempts made at various times to develop these have not been very successful, generally because of relatively low quantity or quality. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Publisher: Forgotten Books
ISBN: 9780266892687
Category :
Languages : en
Pages : 80
Book Description
Excerpt from The District of Columbia, Its Rocks and Their Geologic History In Pleistocene time, when the glaciers on the northern part of the continent were melting, the Potomac Basin was subjected to recurrent floods. Then as the region gradually rose, the shifting waters of the old rivers carved terraces in the rocks, especially in the soft Coastal Plain beds, and deposited on the terraces new sheets of gravel, sand, and clay. The main part of the city is built on these terraces. The earliest life of which any evidence has been found in the District of Columbia existed about 100 million years ago during early Cretaceous time. Animal life of that epoch included fresh-water mollusks, turtles, crocodiles, and huge dinosaurs; among the plants were ferns, sequoia. Water-lily, and grape. Fossil remains from later deposits include various mollusks, shark teeth, and leaves of the oak, elm, sumac, holly, and blueberry. Of the mineral resources of the District of Columbia, stone has had a leading part. Gneiss and granite quarried near Rock Creek and on the banks of the Potomac above Georgetown were used in early buildings and still are employed to some degree. The extensive deposits of gravel, sand, and clay of the Coastal Plain have long been used in the manufacture of brick and terra-cotta tile and in road building. Also present in or near the District are iron ore and diatomaceous earth in the Coastal Plain area and manganese, mica, feldspar, and gold in the Piedmont area, but attempts made at various times to develop these have not been very successful, generally because of relatively low quantity or quality. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
The District of Columbia, Its Rocks and Their Geologic History
Author: Martha S. Carr
Publisher:
ISBN:
Category : Building stones
Languages : en
Pages : 88
Book Description
Publisher:
ISBN:
Category : Building stones
Languages : en
Pages : 88
Book Description
The District of Columbia
The District of Columbia, Its Rocks and Their Geologic History
Author: Martha Ensign Strait Carr
Publisher:
ISBN:
Category : Building stones
Languages : en
Pages : 59
Book Description
Publisher:
ISBN:
Category : Building stones
Languages : en
Pages : 59
Book Description
The District of Columbia, Its Rocks and Their Geologic History
Author: Martha S. Carr
Publisher:
ISBN:
Category : Building stones
Languages : en
Pages : 59
Book Description
Publisher:
ISBN:
Category : Building stones
Languages : en
Pages : 59
Book Description
The District of Columbia, Its Rocks and Their Geologic History
Author: Emma Mertins Thom
Publisher:
ISBN:
Category : Building stones
Languages : en
Pages : 59
Book Description
Publisher:
ISBN:
Category : Building stones
Languages : en
Pages : 59
Book Description
The District of Columbia, Its Rocks and Their Geologic History, by Martha S. Carr
Geography and Geology of the "Big Bend" Of the Columbia (Classic Reprint)
Author: Arthur Philemon Coleman
Publisher: Forgotten Books
ISBN: 9781334491504
Category : Science
Languages : en
Pages : 20
Book Description
Excerpt from Geography and Geology of the "Big Bend" Of the Columbia In this region, rock was observed by the writer only once, and was found to be slate like that near Beaver. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Publisher: Forgotten Books
ISBN: 9781334491504
Category : Science
Languages : en
Pages : 20
Book Description
Excerpt from Geography and Geology of the "Big Bend" Of the Columbia In this region, rock was observed by the writer only once, and was found to be slate like that near Beaver. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
The Testimony of the Rocks
Author: Hugh Miller
Publisher: Forgotten Books
ISBN: 9780483416789
Category : Science
Languages : en
Pages : 532
Book Description
Excerpt from The Testimony of the Rocks: Or, Geology in Its Bearings on the Two Theologies, Natural and Revealed A Restoration of sphenopteris afiinis (frontiepiecc). 1. The Genealogy of Plants. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Publisher: Forgotten Books
ISBN: 9780483416789
Category : Science
Languages : en
Pages : 532
Book Description
Excerpt from The Testimony of the Rocks: Or, Geology in Its Bearings on the Two Theologies, Natural and Revealed A Restoration of sphenopteris afiinis (frontiepiecc). 1. The Genealogy of Plants. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
The Columbia River Gorge
Author: Ira A. Williams
Publisher:
ISBN:
Category : Columbia River
Languages : en
Pages : 144
Book Description
Publisher:
ISBN:
Category : Columbia River
Languages : en
Pages : 144
Book Description