Evidently, the iron formations were deposited in restricted basins more or less isolated from the open sea, thus allowing development of distinctive Eh and pH conditions in each.
The best potential hydrocarbon plays in the basin are related to oblique-collision restricted basins and controlled by break-through normal faults and the presence of NW-SE strike faults that connect the HC source with the reservoirs.
This suggests that the groundwater in the Fuka Basin is restricted to the basin itself.
They appear to be restricted to basins no larger than 150 kilometres in any direction.
In the steadily opening, though still restricted, ocean basins, there was a continuous accumulation of thick flood basalts and a subsequent deposition of sediments.
An erosional unconformity separates the Pleistocene siliciclastic and calcrete deposits above as a single sedimentary unit resting on top of floodplain fines and restricted to the basin center.
This type of sequence is termed an evaporitic couplet and, as has been demonstrated for the Gulf of Suez/Red Sea, is a consequence of a transition from a dry to a more humid climate in a restricted or semirestricted basin.
Some species endemic to these basins appear to be panmictic across multiple basins (e.g., the mussel Bathymodiolus brevior [ 33]), whereas others are restricted to single basins (e.g., neoverrucid barnacles [ 34]).
In addition, the applied methods can be transferred/adapted easily for other regions and are not restricted to river basins.
However, exceedences of sediment guidelines describing contaminated environments in 1997/98 were largely restricted to the western basin and the southern portion of the central basin.
