And 3) an unusual association of ironstones, wrinkle structures and vertebrate tracks with microbial mats and penecontemporaneous
iron encrusting allowing track preservation in the sedimentary record.
The proposed study aims at mapping penecontemporaneous
dolomite in the field.
This variation is due largely to penecontemporaneous
faulting and localized collapse and growth structures related to evaporite growth and dissolution (Olsen and Et-Touhami 2008), as well as faulting related to loading from, and in rheological contrast with, the overlying North Mountain Basalt during the latest Triassic and later.
2004) and suggest penecontemporaneous
formation of dedolomitic rock in Marinova quarry (sample 3) with its void-filling calcite and calcite fill of sample 1A (Fig.
Features that suggest a phreatomagmatic origin for the sets III, IV, and V include: high degrees of fragmentation, good bedding, abundant cohesive ash, large cauliflower-shaped bombs, penecontemporaneous
29) does not crop out within the area of Figure 28, but it is considered to be the source of the granitoid clasts that occur in sedimentary breccia-conglomerates that ate penecontemporaneous
with ore deposition (Thurlow 1981; Stewart 1987).
The Eel Bed of the Kokomo Limestone contains sedimentary structures that include bird's-eye (fenestrate) structures, algal mats, gypsum/anhydrite blebs and pseudomorphs, penecontemporaneous
dolomite, and intraformational storm tide deposits, that we interpret as indicative of a supratidal (Shinn 1983; Hardie & Shinn 1986) depositional environment.
These structures are thought to be penecontemporaneous
with the Cedar Creek Anticline and are likely folding features associated with its formation.
The above-mentioned characteristics indicate that dolostones may result from penecontemporaneous
dolomitization of lime mud on supratidal flat (sabkha) environments by high saline seawater.
In contrast to the Stirling belt, volcanic and plutonic rocks in East Bay Hills, Coxheath Hills, and Sporting Mountain belts are demonstrably penecontemporaneous
at about 620 Ma (Bevier et al.
intrusive igneous rocks (mainly sills, dykes and plugs of basalt-basaltic andesite composition) are present in much of the succession (Smellie et al.
brittle and ductile deformation has concentrated some of the gold-bearing mineralization as mesothermal or transitional vein deposits.