Embed Size (px)
Citation preview
Paradox Basin FieldtripArches and Canyonlands National ParksStructural Geology, Fall 2005
La SalLa SalLaccolithLaccolith
Moab Valley
Moab Valley
Fisher Valley
Fisher Valley
Castle Valley
Castle Valley
Grabe
ns
Grabe
ns
UpheavalUpheavalDomeDome
SaltSalt--Cache Valley
Cache Valley
Paradox Valley
Paradox Valley
Colorado National Colorado National Monument UpliftMonument Uplift
SaltSalt--Cache Valley
Cache Valley
Paradox Valley
Paradox Valley
SaltSalt--Cache
Cache
MoabMoab
CastleCastle
FisherFisher
Airport
Airport
Joints -> Fins -> Arches
Joints -> Fins -> Arches
Joints -> Fins -> Arches
Extensional fractures at base of Landscape Arch (right) and Wall Arch (left)
Isolated Delicate Archand Arch remnants
Moab Fault
North
Detailed topography of Moab FaultNote hangingwall rollover
Cross section of Moab Anticline just north of Colorado River
Paradox BasinStratigraphicSection
Moab Faultrollover
Entrada
Wingate
Small antithetic faults in hangingwall of Moab master normal fault
Small synthetic fault in Hanging-wall of Moab fault
Moab Branch Fault
Define:
Sense of slipSlickenlinesChatter marksGouge
SlickensidesSlickenlinesChatter marksAsperities
Folded Rim
QuaternaryFill
Onion Creek
View north of Onion Creek diapir, Cache Valley rollover in distance, flat ground inForeground is Qal, red on right is Cutler Group strata
Core of rising Onion Creek Diapir
Gypsum Caprock in Onion Creek
Gypsum Caprock in Onion Creek
Upturned inner rim ofOnion Creek Diapir(Cutler Group)
