Wolf Hollow Member
Pillow- to dome shaped and biostromal thrombolites in intraclast-echinoderm pack- to grainstone matrix.
Scour-and fill structures.

Tribes Hill microbial reef mounds, occupied 
the basal part of meter-scale shallowing-upward 
cycles.  They are part of a high-energy facies that a 
sharp, transgressive surface separates from an 
underlying low-energy peritidal setting.  This 
erosional surface served as the surface on which one 
of the reef mounds established itself during initial 
transgression before further deepening.  The others 
overlie a floor of skeletal grainstone reflecting a 
high-stand sea-level facies tract.  Skeletal grainstone 
composes the fill between the mounds.  One channel 
and several aggrading hummocks occupy inter-reef 
mound areas resulting from storm events in a subtidal 
setting.  This study is part of a continuing program of 
Tribes Hill sedimentology.