Geological Tour of Southern Oklahoma

Group 4

Dexter Sandstone Late Cretaceous Sediment is clear but rock gives reddish tint

because the cementing agent is Iron Oxide FeO3

Indicated on the map as KwdSamples found in retaining wall at SOSU and

outcropping on Washington Hill

PawPaw Sandstone & Bennigton Limestone Mid to Late Cretaceous PeriodPawPaw – Yellowish to Brownish red

ferruginous sandstone interbedded with grey to brown, and sandy shale

Bennigton – Blue gray heavy beaded to massive, fine to medium crystalline limestone

Indicated on the map: PawPaw Sandstone as Kbp and Bennington Limestone as Kb

The PawPaw strata-layers were at the bottom of the site with Bennigton Limestone above showing that the sandstone is older than the limestone.

Further studied the Bennington deposit looking for fossils.

McNutt Limestone DepositMid Cretaceous PeriodGrey brown, sandy, fossiliferous limestoneIndicated on the map as KbmDue to the water retaining ability of the

McNutt Limestone, the area is characterized by cattails, equisetum, Mimosa trees, and other semi-aquatic plants.

This is a very thin layer of strata, only 1 to 20 feet thick, but it is very dense giving it good water retaining qualities.

Soper LimestoneMid to early

Cretaceous PeriodGrey fossiliferous

limestoneIndicated on the

map as KbsVery thin layer of

strata, 0 to 2 feet in thickness, observed from bus in yard.

Caddo FormationMid to Early Cretaceous

PeriodCaddo Limestone and

ShaleIndicated on the map as

KcCollected limestone

fossils

Kiamichi FormationEarly CretaceousDark-gray to black, fissile shales,

interbedded in upper parts with thin beds of yellow-gray

Indicated on the map as Kk

Antlers Sandstone• Gathered bag sample of sand• Samples were finished-Screened and

cleaned• Mine supplies Cardinal Glass in Durant• Sand is 65% Silica• Indicated as yellow and Ka on the map

Sulphur FaultGranitic Gneiss-pCgg

on South side of faultCaney Shale-Mc

On North side of fault4 mi North of Coleman on Sandy CreekDrive-By only: No samples

Woodford Shale-MDswMississippi Devonian Time Period 320-408

m/y/aWith phosphate nodules½ Mile west of Hwy 48 on Rock Creek Road note strike and dipStrata has been folded and tilted-not straight

up and down.Important to area with much drilling for gas

and oil.

Wapanucka Formation-Ipw Drive-by: No samples Limestone: Formed on a

reef: Crinoid fossils

Granitic Gneiss-pCggApproximately 300 m/y/oSamples looked like intrusive granite.Seaside Alder growing in area. Only found in

a handful of locations in U.S.Indicated as orange on the map.

Tishomingo Granite-pCti

Drive-by only: No samples

From hwy 337/99, east on W. Blue River Rd, south on Prairie Rd, east on E Harbert Rd, Big Sandy Creek

Cool Creek and McKenzie Hill formation-Ocm Dolomites-Oem- on the (D) Side of the Blue

River FaultOrdivician time period. Approx. 500 m/y/aMg replaces 50% of Ca in the CaCO3

limestone.Samples extremely hard and white in color.

Troy Granite-pCtr

Second youngest granite of the (4) studied today.

Many distinct minerals show in the rocks.

Granodiorite-pCtr

Youngest of the (4) granites studied today.

Tishomingo Granite –pCtiSecond oldest of the (4) granites studied

today.1.37 B/Y/O

Looks pinkish in color.East on Hwy 73 mi to south 2 mi, abandon

quarryRock for Oklahoma state capital building was

quarried from here.

CRETACEOUS

66-144

Antlers Sandstone (Ka)

PENNSYLVANIAN

286-320

MISSISSIPPIAN

320-360360-408

DEVONIANSILURIAN

ORDOVICIAN

CAMBRIAN

408-438438-505505-545545 mil -4.6 bill

PRECAMBRIAN

245-286PERMIAN

144-286 }

}Caney Shale (Mc)Woodford Shale (MDsw)

Dolimite (OCm)Four Granites: Youngest to Oldest Ending at 1.39 Bill: Granodiorite (pCgr)Troy Granite (pCtr)Tishomingo Granite(pCti)Granitic Gneiss (pCgg)

Time of erosion in OK

}

Period Mil/yrs ago

Woodford Shale (MDw)

Black shale w/much chert

Erodes into valleys

Viola Group (Ov) Limestones684 feetForms steep ridgesFolded into an anticline: oldest in middleWoodford-Sylvan-ViolaViola layered with shale.No sample at this spot for the Sylvan

limestone.

1000 ft North of last stop on east side of road, at stock pond entrance for second contact.

Limestone folded with shale.Swirls evident in layers.

McLish Formation (Oml)Basal sandstone-med.-grained quartzose

sandstoneShale-Gray/Green color. Upper limestone (475 feet)

Oil Creek Formation (Ooc)Basal sandstone (32 ft)Shale-Gray/Tan with crystalline limestone (715

ft)

Joins Formation(Oj)Fossiliferous limestoneLight gray

West Spring creek Limestone (Ow)Mostly gray to tan limestoneOolitic limestoneGreat photo site

Radio tower on Hwy 77Cool Creek Formation (Occ)Limestone (1300 ft) grayFine grainedChert mixed in-orange, black, red grey &

white

Butterly Dolomite (Ob)Dolomite-sandy,

pink/gray, medium to course grained, milky quartz contained.

Oldest member of upper Arbuckle group. At Ordovician-Cambrium boundary (297 ft).

Kinblade Formation (Ok)/West Spring Creek Formation

(Ow).Marker 25 feet

below top of the Kinblade limestone.

Lots of twisted rock from faults

North Hwy 77 to crossover then south ¼.

Sylvian Shale (Os)– Mostly olive green to greenish-grey, plastic to fissile clay shale; at the contact with oolitic KEEL LIMESTONE of the HUTTON GROUP- (OSDh)

Home of the Fried Pie!!!

South on I-35 to first turnout, at the entrance ( Marker 29) north end west side

Collins Ranch Conglomerate (IPc)Graben and syncline, conglomerate pebbles

and cobbles ranging in age from West Spring Creek to Reagan Sandstone, deposited into a graben (3000 ft).

Parking area near the Geologic Sign. West Spring Creek Formation (Ow)-U/Collins

Ranch Conglomerate (IPc)-DFault line for the north boundray of the graben

runs north of the road to the sign.

West side of the south end of the turnout;I-35 Marker 28 missingKindblade Formation (Ok)/ West Spring Creek

Formation (Ow)Tectonic breccia in the Kindblade

Cattle pens interchange

Royer Dolomite (Cry)

Only Cambian sampled

Pink to gray

Cody BynumBetty

DeatherageAlice DwyerRon DwyerElissa HefleyMichelle HillAndrea PhillipsChuck RyanJackie RyanSheila SullivanJason WardDanesa Wilson

Dr. AvardDr. EggletonGeorgia DahlgrenWanetta ThompsonSherry JonesDickson SchoolsSOSUState Dept of Education