$0.00
Abstract
9-5 Nations, Dale, Wilt, J.C., and Hevly, R.H., 1985, Cenozoic paleogeography of Arizona, in Flores, R.M., and Kaplan, S.S., editors, Cenozoic paleogeography of west-central United States: Society of Economic Paleontologists and Mineralogists, Rocky Mountain Section, Symposium 3, p. 335-355.
Abstract
9-5 Nations, Dale, Wilt, J.C., and Hevly, R.H., 1985, Cenozoic paleogeography of Arizona, in Flores, R.M., and Kaplan, S.S., editors, Cenozoic paleogeography of west-central United States: Society of Economic Paleontologists and Mineralogists, Rocky Mountain Section, Symposium 3, p. 335-355.
ABS
The Cenozoic paleogeography of Arizona is interpreted from the sedimentary and volcanic strata throughout the state. Paleogeographic features such as mountains, plateaus, depositional basins, and drainage systems are interpreted within the constraints of known structural features of Laramide age, and in some places, the depth of erosion into the pre-Cenozoic basement rocks. The absence of Paleocene sediments and the pronounced unconformity beneath Cenozoic rocks attests to an epeirogenic uplift of the region during the Laramide orogeny. This uplift was most pronounced in central and western Arizona. The resultant erosion produced a beveled surface that cut deeply into Precambrian rocks of central Arizona and removed much of the Mesozoic cover of the future Colorado Plateau. Paleocene drainage systems transported the sediments of that age northward to the Uinta basin of Utah and eastward to the San ,Juan basin of New Mexico, along the downwarped Coconino and Baca-Eager basins that were formed as a synclinal trend adjacent to the f1ogollon Highlands. The northward regional drainage was controlled by the Sevier foreland basin in Utah.
During the Paleocene and Eocene, compressional deformation of the Laramide orogeny up 1ifted the Rocky Mountains. which interrupted eastward drainages and converted the Colorado Plateau to a very large internally drained basin during the Eocene. It was bounded on the west by the Sevier thrust belt, on the north by the Uinta uplift, on the south by the Mogollon Highlands and by the Rocky Mountains to the east. That same deformation created numerous north-trending anticlinal and synclinal folds, thereby converting the Colorado Plateau into a synclinorium. These interior folds controlled the development of drainage patterns throughout the remainder of the Tertiary.
Eocene strata on the southern Colorado Plateau are typically coarse-grained, well-sorted conglomerates, with clasts of Precambrian igneous and metamorphic rock whose provenance was the Mogollon Highlands of central and southern Arizona. These strata were deposited in elongate synclinal and erosional valleys north of the Mogollon Highlands by streams that flowed northward into the early Tertiary Coconino and Baca-Eager basins on the southern margin of the Colorado Plateau. The coarse clastics were deposited at the southern margins, and fine-grained clastic and carbonate sediments accumulated in the more distal, northern parts of the basins. Drainage patterns were controlled by Laramide anticlinal uplifts and synclines.
In southern and western Arizona, Paleocene volcanic rocks are common, but no sediments of Paleocene or Eocene age are known. Eocene volcanic rocks are rare in Arizona. Oligocene sediments and volcanics occur in uplifted fault blocks of present-day mountain ranges and in the subsurface of several sedimentary basins. These sedimentary rocks include coarse-grained, angular, poorly-sorted redbeds that were deposited as fanglomerates adjacent to local highs that were formed by Laramide and middle Tertiary orogenesis. Fine-grained clastic, carbonate, and evaporite sediments are intercalated with those basin margin fanglomerates in some areas, suggesting deposition in the center of closed basins. Late Oligocene-Early Miocene strata include fanglomerates and fine-grained fluvial and lacustrine sediments with clasts and flows of silicicic intermediate volcanic rocks reflecting the onset of extensive volcanism and structural warping of the mid-Tertiay orogeny. Middle Miocene sediments and volcanics were affected by low-angle norma1 faulting, subsequent folding, and unroofing of metamorphic core complexes.
Late Miocene-Pleistocene sedimentary and volcanic rocks are generally confined to basins that coincide with modern valleys throughout the state. Late Miocene to Ho1ocene strata in the Basin and Range Province were deposited in norma1-fault bounded extensional basins initiated by the Basin and Range disturbance. In southern Arizona basin deposits typically exhibit gradation from marginal fanglomerates to fine-grained clastic, carbonate, end evaporite sediments in the centers of closed basins. By late Miocene time, the integrated drainage system of the Gila, Salt, Verde and other tributaries to the lower Colorado River had developed, and dissection of the higher basins (e.g., Chino Valley, Verde, Tonto, and Safford basins) had begun in response to the lowered base level established by the opening of the Gulf of California in the late Miocene. The Pliocene- Pleistocene paleogeography of Arizona was similar to present topography except for a few Holocene volcanic mountains and increased dissection of eroded stream valleys.
Key words
Cenozoic, paleogeography, Arizona, Coconino basin, Baca-Eager basin, Mogollon Highlands, Laramide, mid-Tertiary, Basin and Range Disturbance, Eocene conglomerateds,
| Book Format | Print to Order, Digital Version |
|---|
Abstract
9-5 Nations, Dale, Wilt, J.C., and Hevly, R.H., 1985, Cenozoic paleogeography of Arizona, in Flores, R.M., and Kaplan, S.S., editors, Cenozoic paleogeography of west-central United States: Society of Economic Paleontologists and Mineralogists, Rocky Mountain Section, Symposium 3, p. 335-355.
ABS
The Cenozoic paleogeography of Arizona is interpreted from the sedimentary and volcanic strata throughout the state. Paleogeographic features such as mountains, plateaus, depositional basins, and drainage systems are interpreted within the constraints of known structural features of Laramide age, and in some places, the depth of erosion into the pre-Cenozoic basement rocks. The absence of Paleocene sediments and the pronounced unconformity beneath Cenozoic rocks attests to an epeirogenic uplift of the region during the Laramide orogeny. This uplift was most pronounced in central and western Arizona. The resultant erosion produced a beveled surface that cut deeply into Precambrian rocks of central Arizona and removed much of the Mesozoic cover of the future Colorado Plateau. Paleocene drainage systems transported the sediments of that age northward to the Uinta basin of Utah and eastward to the San ,Juan basin of New Mexico, along the downwarped Coconino and Baca-Eager basins that were formed as a synclinal trend adjacent to the f1ogollon Highlands. The northward regional drainage was controlled by the Sevier foreland basin in Utah.
During the Paleocene and Eocene, compressional deformation of the Laramide orogeny up 1ifted the Rocky Mountains. which interrupted eastward drainages and converted the Colorado Plateau to a very large internally drained basin during the Eocene. It was bounded on the west by the Sevier thrust belt, on the north by the Uinta uplift, on the south by the Mogollon Highlands and by the Rocky Mountains to the east. That same deformation created numerous north-trending anticlinal and synclinal folds, thereby converting the Colorado Plateau into a synclinorium. These interior folds controlled the development of drainage patterns throughout the remainder of the Tertiary.
Eocene strata on the southern Colorado Plateau are typically coarse-grained, well-sorted conglomerates, with clasts of Precambrian igneous and metamorphic rock whose provenance was the Mogollon Highlands of central and southern Arizona. These strata were deposited in elongate synclinal and erosional valleys north of the Mogollon Highlands by streams that flowed northward into the early Tertiary Coconino and Baca-Eager basins on the southern margin of the Colorado Plateau. The coarse clastics were deposited at the southern margins, and fine-grained clastic and carbonate sediments accumulated in the more distal, northern parts of the basins. Drainage patterns were controlled by Laramide anticlinal uplifts and synclines.
In southern and western Arizona, Paleocene volcanic rocks are common, but no sediments of Paleocene or Eocene age are known. Eocene volcanic rocks are rare in Arizona. Oligocene sediments and volcanics occur in uplifted fault blocks of present-day mountain ranges and in the subsurface of several sedimentary basins. These sedimentary rocks include coarse-grained, angular, poorly-sorted redbeds that were deposited as fanglomerates adjacent to local highs that were formed by Laramide and middle Tertiary orogenesis. Fine-grained clastic, carbonate, and evaporite sediments are intercalated with those basin margin fanglomerates in some areas, suggesting deposition in the center of closed basins. Late Oligocene-Early Miocene strata include fanglomerates and fine-grained fluvial and lacustrine sediments with clasts and flows of silicicic intermediate volcanic rocks reflecting the onset of extensive volcanism and structural warping of the mid-Tertiay orogeny. Middle Miocene sediments and volcanics were affected by low-angle norma1 faulting, subsequent folding, and unroofing of metamorphic core complexes.
Late Miocene-Pleistocene sedimentary and volcanic rocks are generally confined to basins that coincide with modern valleys throughout the state. Late Miocene to Ho1ocene strata in the Basin and Range Province were deposited in norma1-fault bounded extensional basins initiated by the Basin and Range disturbance. In southern Arizona basin deposits typically exhibit gradation from marginal fanglomerates to fine-grained clastic, carbonate, end evaporite sediments in the centers of closed basins. By late Miocene time, the integrated drainage system of the Gila, Salt, Verde and other tributaries to the lower Colorado River had developed, and dissection of the higher basins (e.g., Chino Valley, Verde, Tonto, and Safford basins) had begun in response to the lowered base level established by the opening of the Gulf of California in the late Miocene. The Pliocene- Pleistocene paleogeography of Arizona was similar to present topography except for a few Holocene volcanic mountains and increased dissection of eroded stream valleys.
Key words
Cenozoic, paleogeography, Arizona, Coconino basin, Baca-Eager basin, Mogollon Highlands, Laramide, mid-Tertiary, Basin and Range Disturbance, Eocene conglomerateds,
royalirab
Cialis
Lasix
Septilin
Stromectol
Zithromax 250 Mg Dosage
generic viagra good
Cialis Andorre
Viagra
Md Price Pharmacy Discounts
Prednisone
Clomid Besoin D Aide Grossesse
Crequeven
http://prednisonebuyon.com/ - Prednisone
what is gabapentin used for
Levitra Alla Menta
woogueree
http://buyplaquenilcv.com/ - how long does it take plaquenil to work for lupus
Blersolla
Priligy
jimdofreemus
We spent a lot of time at her home. Maybe so her mother could keep an eye on us. Mrs. Spencer made sure to be around, offering drinks, snacks, chit chat. I noticed that she was fairly young herself. Granted at my age, anyone over 25 was old, but she was probably mid-30s, divorced. If she was a indiction of how Carley would develop, maybe I should wait. Mrs. Spencer had fuller breasts and a nice butt. She appeared to be in great shape for her "advanced" age. I knew she was keeping an eye on me as much as I was on her and her younger daughter. Her eldest, Sharon was away at college at the time. With Mrs. Spencer around we mostly limited ourselves to holding hands and sneaking in a few light kisses. One day Mrs. Spencer caught us by surprise walking in as I'd slid my hand up from Carley's stomach to rub her right breast through her shirt. She didn't really need a bra yet, so I could feel her nipple, hard, through her shirt. Just this much contact had me hard also. https://sites.google.com/view/66QsqlMSUhKiCkO3 https://sites.google.com/view/WCdRyVUP9aRhqnci
Immurlece
Lasix
Zithromax
Comprar Cialis Original En Andorra
assauptar
Plaquenil
dowsThews
https://buyzithromaxinf.com/ - Zithromax
Priligy
Naltrexone Online
spearie
https://buypriligyhop.com/ - Priligy
Iodigegix
Zithromax
Lasix
Tetracycline Antibiotics For Sale
Editels
http://buylasixshop.com/ - lasix for dogs
peveBlect
stromectol for scabies
viagra and cialis online
7zx Cialis Best Sellers Catalog
addeday
http://buytadalafshop.com/ - Cialis
propecia cost walmart
direct isotretinoin next day delivery discount
inpunny
Cialis
Loggexy
Viagra
stromectol ivermectin for humans
Farmacias Online En Canada
ageRgomia
http://buystromectolon.com/ - stromectol otc
loosesk
does propecia work
cialis pharmacy online
Viagra Generique En Ligne
endogue
http://buysildenshop.com/ - Viagra