The presence of diverse fauna and micrite matrix indicates subtidal marine conditions suggesting that AMB 1 facies was deposited below fair weather wave base under distal middle shelf settings.
The high diversity of fauna and micritic matrix indicates that deposition of the AMB 3B facies took place below fair weather wave base under subtidal conditions of proximal middle shelf settings.
The dominant discontinuous nature of oncoid laminae, which were transported episodically by storm currents, and the lack of tractive structures in the peloidal facies (F2A) suggest that the facies subassociation A1 was deposited in the mid-carbonate platform below the fair-weather wave base
and above the storm wave base
Estimates of absolute depth can be made based upon integrated analysis of a variety of distinctive sedimentary structures related to exposure, indicators of position with respect to shoreline, normal wave base
and storm wave base
, and evidence of light-related zones (Brett et al.
The feature of benthic fauna and stratigraphic relationships with the other microfacies suggest that marl facies were deposited in an open lagoon, calm, deep and normal-salinity water but the co-occurrence of planktonic and some benthic (Nummulitidae) foraminifera in the base of the Asmari marl and marly limestone, suggest that this facies was deposited in calm, low energy hydrodynamic and deep normal salinity water which indicates deposition below the storm wave base
This suggests the megaripple sandstone/fine grained sandstone/siltstone interbed sequence formed in a fluctuating shallow-marine environment characterized by fluctuating energy conditions in which deposition alternated between just below and within wave base
Scientists call this depth the wave base
, below which water movement is negligible and the ocean is indeed calm.
The discussion of complexities of sea level rise has some convoluted reasoning, including the statement that '[O]ne main effect of sea level rise is an increase in wave base
and a corresponding increase in storm frequency and intensity'.
The condition of this environment is shallow, with medium to low energy and presence in the photic zone below the fair-weather wave base
corals, gastropods, Between wave base
and trilobites, ostracods storm base.
The carbonate deposition generally occurs below wave base
Mr Stuart Gibson, Bunkers Big Wave Base
Camp Goat Bluff, South Arm.