Weakly consolidated river gravel under Chemehuevi muds. Gravels overlie strongly consolidated Bullhead gravels toward lake (to the left in photo)
x-strat fluvial sand with calc petrified wood
Great example of interbedded Qch (Qcw?) and trib fans.
River gravel at top grades laterally with mud and sand. Overlies prominent yellow bed of Tcb; Tcb overlies Tlc which look like Qch but is not.
Abundant petrified wood in prominently oxidized beds of Tcb...yellow.
beach barrier lagoon...classic.
probably should return to this wash at an earlier time of day....
classic bullhead
Fan over Chemehuevi over Bullhead
fan over Qch/Qcw, some interbedding going on. Interesting implications.
Bulk of bluff is fan. Interbedded fan and river evident near field book. Qch or Qcw seds at base.
Beach front fan that rips through the Qch in this area. Wondering if blotches of fines are reworked and not interfingered river and fan.
Qch overlain by river gravel...need to spend more time in this area...lots of units in small space.
Qch and abandoned (hanging) young fan remnant. Suspect deep incision of young fans driven by lateral migration of unregulated Colorado River.
paleosol on erosional topography.
The only three clasts I could find. Slightly worked...likely manuports.
same paleosol in the slopes up this wash.
Thought it was a fault, can't prove. More likely a paleosol on erosional topography.
Lots of Tlc
Tlc
Lost Cabin beds
The bulk of the overall precarious looking pile of rhythmites appears to occupy a paleochannel.
check subsequent photo in this set that shows the teetering block having fallen apart...
Rhythmite sands are green.
Rhythmically bedded mud and sand in paleochanel fill near Cottonwood Cove.
K. Springer checking out root traces in rhythmites in paleochannel.
Highest bullhead in quad: 1408'
great view of ubiquitous gravel stripes on old fan surface. these things are everywhere in the quad
pour-over caused by big rhyolite dike
cross-strata in Bullhead dipping into lake
base of bullhead paleochannel
edge of bullhead paleochannel with concave base
plaster of bullhead sand on fanglomerate
edge of bullhead paleochannel at lake level
chemehuevi in niche in old fan interfingered to right (west) with younger fan
Lost Cabin overlain by Q fan and Qch. Base of Qch at left sits on rounded, fluvial gravel. At right it overlies mainly trib gravel.
the big dipper
sizzling chollas
somebody really hated this car
fines in the bullhead
large local boulder as lag on stripped bedrock surface
likely Bullhead at base of Qcr
Bullhead alluvium at base of Arizona bluffs
Miocene? valley fill
View up Wishy Wash
Interfingered fan gravels and Cottonwood sediments.
The Cottonwood sediments.
Outcrop of Tcb fines in piedmont drainage. Typical blob-type outcrop.
Moderately varnished boulder bar in small trib.
Reworked Tcb mud clast in Qai fan
Reworked Tcb mud block in Qai fan with major reoworked Tcb component
Erosional unconformity of fan gravel over CR fines
Conspicuously rounded basal conglomerate of LCR gravel. Largest clasts are locally derived.
The 'mixed' fan unit which contains abundant reworked LCR gravel. Good evidence for the removal of Bullhead seds in the Pleistocene.
Qai fan unit with abundant reworked Bullhead alluvium (Tcb). This unit helps explain the lack of in situ Bullhead in this quad.
cloven rock on Qai fan.
Mohave-ish terrace surface looking north
second terrace above the lake...clearly a fill terrace
Gravelly surface exhumed or inset was the question here.
Unstable gravel bluffs of concern to the park service. Post-Chemehuevi gravels
Airstrip arroyo
Upper half meter or so of Airstrip terrace soil.
Arroyo in Airstrip terrace. Great exposure of Stage 3 Bk soil and fluvial gravel.
Hilariously circular beach. Shows that Qby is quite mappable along the lake.
Soil with morphology in common to most of the CR surfaces on the AZ side in SMNW quad, despite topographic separation.
Cross-bedded fluvial sand capped by fluvial gravel.
Nice fluvial sand in terrace face. Overlain by gravel with Stage 3 soil.
Great view of strat on NV side.....just out of map, and much clearer than the part that is in the map.
Complex assemblage of river gravel (base), interbedded trib gravel and river sand, overlain by interbedded river sand and gravel, capped with gravel.
interbedded fan gravel and river sand sequence which overlies bedded river gravel
Mohave (?) Terrace cut. Az side.
'Mohave' terrace surface.
Lakeshore beds of river sand and mud overlain by thick gravel (here with strath cut in)
Embayment with complicated river gravel, mud, sand, and trib gravel mixture.
Typical lakeshore assemblage of river gravel and overlying mud and sand. Stratigraphically low in this case.
Very cool trib paleochannel cut in and locally interbedded with LCR fines.
Complexly interstratified LCR sand and trib gravel.
Surprisingly strongly developed soil in piedmont Qai(?) unit.
Great view of the Chemehuevi seds sitting right on top of an older fan unit.
multiple levels of varnished piedmont gravels
LCR fines overlain by fan gravel with large CRg component (reworked).
Typical piedmont trib wherein younger, inset surfaces are largely veneers on eroded remnants of the older alluvium.
Nice view of the lake and Mt. Davis
Quat. LCR gravel and sand overlying foundered block of Tcb. Need to revisit and check that it is not block of Q fan with reworked Tcb...
tilted (detrital) chunk of Bullhead in fan gravels
Sand and some mud in the Bullhead.
Sandy facies of the Bullhead alluvium.
Strongly developed carbonate soil formed in Bullhead alluvium and overlain by strong (but weaker) soil formed in overlying fan gravels. Wishy wash.
lower Nomlaki tephra layer (~4.1 Ma) in Wishy wash. Not in LCR seds, but in fanglomerate inferred to interfinger with them.
Big Chemehuevi pile. One of Lundstrom et al.'s research locations.
Precarious drapes of LCR gravel, sand, and mud on bedrock.
LCR gravel overlying erosion surface cut on tilted basin fill seds.
tephra bed in tilted and faulted basin fill
gravel covered strath
petrified wood; carbonate variety typical of Chemehuevi seds downstream.
Serious mud overlain by gravel along lake shore. Likely well below main Chemehuevi pile.
Gravel veneer on strath
Interbedded fan gravel and CR sediments in Cottonwood seds..i.e. those stratigraphically below the most conspicuous pile of mud with overlying sand.
Pile of river gravel directly below the Cottonwood seds is likely related channel facies.
Typical mud and sand assemblage with disconf. gravel found along lake shore. Some evidence that these units are low in the section...unresolved.
LCR sand and silt that are stratigraphically below the principal Chemehuevi pile (overlain by interval of fan gravels)
Some reservoirs are pretty
Thick pile of CR fines stratigraphically below the typical Chemehuevi pile. Appear to be separated from principal outcrop by alluvial fan unit. These seds comprise the Cottonwood seds on the ofr map.
Bouse beach deposits
Bouse: tufa cemented granular sand; flat-lying.
Lowest Bouse marl in quad
Inferred beach deposit with intbdd sandstone, marl, and gravel
Bouse marl onlap, high on the Eldorado Mtn piedmont
ENE dipping beds of Bouse at piedmont onlap
Bouse marl overlain by ss forming knickpoint
highest otc of Bouse marl and ss; marl is dipping ENE toward valley axis
in situ tufa clasts at 550 m--backpack on highest clast; nice perspective on relation to valley axis
Base of paleochannel in river gravels. May be two distinct gravels here. One is prob bullhead based on heavy induration (only) and the other is at the base of a complex Q section and is notably less indurated.
B^3: Beautiful Bouse beach
Lower Nomlaki tephra layer in Wishy Wash fanglomerate.
