Descrriptions of rock units exposed at FRM are as follows:

FRM6 Devonian 574’, 174 m conspicuous dark-gray dolomite

FRM5 upper Cambrian 110’, 33 m dolomite;

FRM4 middle - upper Cambrian 2,000”, 610 m dolomite

FRM3 Cambrian 584’, 177 m upper 1/2 burrow mottled limestone

FRM2 Cambrian 132’, 40 m coarse crossed bedded sandstone; unconformable base

FRM1 Precambrian unmeasured diffuse granite masses & garnet biotite schist, large K-feldspar phenocrysts; unconformable top

Photo 2 is from www.insidegretchenshead.com/

Descrriptions of rock units exposed at VRG are as follows

VRG4 upper Devonian 360..6’, 109.2 m medium grained dolomite with fairly prominent layers of flint and rusty weathering quartzite; substantial fine grained limestone

VRG3 Cambrian 440.8’, 133.6 m very fine grained, light gray dolomite; weathers to lighter brown that the VRG1

VRG2 Cambrian 33’ thinly interbedded green shale and dolomite

VRG1 middle & upperCambrian 33’, 9 m dolomite, weathers brown, fine-meduim grained dolomite with interbedded limestone and dolomite; one glauconitic layer

Photo 3 is from the author.

Descrriptions of rock units exposed at BGRCA are as follows:

BGRCA4 undifferentiated (Grand Wash Dolomite) upper Cambrian 426’, 130 m white -buff massive dolomite; white to yellow very fine grained thick bedded dolomite; gray fine grained thick bedded dolomite; horizontal trace fossils

BGRCA3 middle - upper middle Cambrian 136’-827’, 42-252 m resistant cliffs, gradational basal contact; thin to thick bedded; commonly mottled; dolomitic and calcareous mudstone and packstone; thin beds of micaceous shale and siltstone; small scale trough and planar tabular and low angle cross stratification at many localities; fenestral fabric and dessication cracks also reported; trace fossils not as abundant as in BGRCA2

BGRCA2 upper lower Cambrian to middle Cambrian 270’-450’, 82-137 m dominate lithology is greenish clay; slope forming, interbedded fine-grained sandstone, siltstone and shale; conglomerate and sandstone contain quartz and minor feldspar, sedimentary rock fragments and glauconite, many sandstones and siltstone greenish color, a number of reddish sandstones and siltstone contain hematitic ooids and iron cement; inarticulate brachiopods, trilobites, trace fossils and Hyolithes locally abundant

BGRCA1 lower C in west to middle C in east 100-325’, 30-100 m medium-coarse grained feldspar and quartz rich sandstone with granule to pebble size conglomerate at base; cliff with beds typically <1 m thick, planar and trough cross-beds decreasing in scale up section; overlying main cliff is a thinner zone of interbedded fine-medium grained sandstone, smaller scale trough and ripple cross stratification