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USGS I [Investigation] Maps # 2501 - 3000 (part 6)




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USGS I [Investigation] Maps # 2501 - 3000 (part 6)

For the USGS I Maps of a single state, click here

 

Links to other USGS I Maps:

USGS I Maps, part 1 (# 1 - 500)

USGS I Maps, part 2 (# 501 - 1000)

USGS I Maps, part 3 (# 1001 - 1500)

USGS I Maps, part 4 (# 1501 - 2000)

USGS I Maps, part 5 (# 2001 - 2500)



I Maps

I 2504 / NEOGENE GEOMORPHIC EVOLUTION OF THE CENTRAL SAN JUAN MOUNTAINS NEAR CREEDE, COLORADO, $ 10

I 2525 / GEOLOGIC MAP AND CROSS SECTIONS OF THE CENTRAL AND SOUTHERN HIGHLAND MOUNTAINS, SOUTHWESTERN MONTANA, $10

I 2535 / GEOLOGIC MAP OF THE MOUNT ICHABOD AREA, NEVADA, $ 10

I 2536 / GEOLOGIC MAP OF THE ROWLAND-BEARPAW MOUNTAIN AREA, NEVADA, $ 10

I 2541 / INTERPRETIVE MAP AND GUIDE TO VOLCANIC GEOLOGY OF CHIRICHAHUA MONUMENT AND VICINITY, COCHISE COUNTY, ARIZONA, $ 10

I 2584 /
GEOLOGIC MAPS OF WESTERN AND NORTHERN PARTS OF THE GALLATIN NATIONAL FOREST, SOUTH-CENTRAL MONTANA, $ 10

I 2606 / GEOLOGIC MAP OF THE EASTERN GOGEBIC IRON RANGE, MICHIGAN, $ 10

I 2624 / GEOLOGIC MAP OF THE BARTLETT MOUNTAIN QUADRANGLE, ARIZONA, $ 10

I 2639 / HISTORIC TRAIL MAP OF THE DENVER 1 X 2 QUAD., CENTRAL COLORADO, $ 10

I 2645 A / GEOLOGIC MAP OF THE CENTRAL MARYSVALE VOLCANIC FIELD, SOUTHWESTERN UTAH, $ 10

I 2654 / MINES AND PROCESSING PLANTS IN THE UNITED STATES, $ 10

I 2681 / GEOLOGIC MAP OF THE SILVERTON AND HOWARDSVILLE QUADRANGLES, COLORADO, $ 10

I 2700 / WORLD MAP OF VOLCANOES AND PRINCIPLE AERONAUTICAL FEATURES, $ 10

I 2723 / GEOLOGIC MAP OF THE LASSEN PEAK, CHAOS CRAGS, AND UPPER HAT CREEK AREA, CALIFORNIA, $ 20

I 2735 / MAPS SHOWING THE EXTENT OF MINING, LOCATIONS OF MINE SHAFTS, ADITS, AIR SHAFTS, AND BEDROCK FAULTS, AND THICKNESS OF OVERBURDEN ABOVE ABANDONED COAL MINES IN THE BOULDER-WELD COAL FIELD, BOULDER, WELD, AND ADAMS COUNTIES, COLORADO, $ 10

I 2751 / GEOLOGIC MAP OF THE YOSEMITE QUADRANGLE, CENTRAL SIERRA NEVADA, CALIFORNIA, $ 10

I 2755 / GEOLOGIC MAP OF THE YUCCA MOUNTAIN REGION, NEVADA, $ 10

I 2780 / GEOLOGIC MAP OF THE S
AN CARLOS INDIAN RESERVATION, ARIZONA, $ 18

I 2799 /
GEOLOGIC MAP OF THE CENTRAL SAN JUAN CALDERA CLUSTER, SOUTHWEST COLORADO, 34 pages, 4 map sheets, includes a sealed database cd, $ 20  [The San Juan Mountains are the largest erosional remnant of a composite volcanic field that covered much of the southern Rocky Mountains in middle Tertiary time. The San Juan field consists mainly of intermediate-composition lavas and breccias, erupted about 35-30 Ma from scattered central volcanoes (Conejos Formation) and overlain by voluminous ash-flow sheets erupted from caldera sources. In the central San Juan Mountains, eruption of at least 8,800 km3 of dacitic-rhyolitic magma as nine major ash flow sheets (individually 150-5,000 km3) was accompanied by recurrent caldera subsidence between 28.3 Ma and about 26.5 Ma. Voluminous andesitic-dacitic lavas and breccias erupted from central volcanoes prior to the ash-flow eruptions, and similar lava eruptions continued within and adjacent to the calderas during the period of more silicic explosive volcanism. Exposed calderas vary in size from 10 to 75 km in maximum dimension; the largest calderas are associated with the most voluminous eruptions]




End of USGS I Map Catalogs


USGS I Maps, part 1 (# 1 - 500)

USGS I Maps, part 2 (# 501 - 1000)

USGS I Maps, part 3 (# 1001 - 1500)

USGS I Maps, part 4 (# 1501 - 2000)

USGS I Maps, part 5 (# 2001 - 2500)





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