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Eocene epoch
(Encyclopedia) Eocene epochEocene epochēˈəsēnˌ [key], second epoch of the Tertiary period in the Cenozoic era of geologic time, from approximately 54.9 to 38 million years ago. The Eocene in North…Geology of the Grand Canyon: The Eocene.
THE CRETACEOUS.THE EOCENE.The foreground of the picture is full of strength and animation. At our feet is the brink of a precipice where the profiles descend 800 feet upon rugged sloped…Tertiary period
(Encyclopedia) Tertiary periodTertiary periodtûrˈshēĕrˌē [key], name for the major portion of the Cenozoic era, the most recent of the geologic eras (see Geologic Timescale, tablegeologic timescale,…Oligocene epoch
(Encyclopedia) Oligocene epochOligocene epochŏlˈəgōsēnˌ [key], third epoch of the Tertiary period in the Cenozoic era of geologic time, lasting from 38 to 24 million years ago. More of North America…Geology of the Grand Canyon: Chapter I. The Plateau Province.
CHAPTER II. GEOGRAPHY OF THE G...CHAPTER I. THE PLATEAU PROVINCE.The investigations made by this division of the Geological Survey during the last two years have been pursued with the object…Geology of the Grand Canyon: The Cretaceous.
THE EOCENE.THE JURASSIC.THE CRETACEOUS.The platform immediately below the Pink Cliffs is picturesque rather than grand. Rough rolling ridges of yellow sandstone, long sloping hillsides and…Lyell, Sir Charles
(Encyclopedia) Lyell, Sir CharlesLyell, Sir Charleslīˈəl [key], 1797–1875, British geologist. After studying and briefly practicing law, he spent most of his life in travel and in popularizing…Geology of the Grand Canyon: Chapter Iv. The Great Denudation.
CHAPTER III. THE TERRACES.CHAPTER V. THE TOROWEAP AND UINKARET.CHAPTER IV. THE GREAT DENUDATION.Before leaving the terraces we may with advantage pause to contemplate the great lesson in…Geologic Timescale (table)
(Encyclopedia) Geologic Timescale Era Period Epoch Approximate duration (millions of years) Approximate number of years ago (millions of years) Cenozoic Quaternary Holocene 10,000 years ago to…Geology of the Grand Canyon: Chapter Vi. The Kaibab.
CHAPTER V. THE TOROWEAP AND UINKARET.CHAPTER VII. POINT SUBLIME.CHAPTER VI. THE KAIBAB.The Kaibab is the loftiest of the four plateaus through which the the Grand Cañon extends. It is from 1…