The assembly of Gondwana in the Ediacaran was concluded by

extensive arc magmatism along its northern margin. Extensional events in the Early

Paleozoic led to rifting and the eventual separation of terranes ...

The Lower Ordovician Shirgesht Formation in central Iran is composed of siliciclastic and

carbonate rocks deposited in diverse coastal and marine shelfal environments (tidal flat, lagoon,

shoreface, offshore-shelf and carbonate ramp...

from the impacts of deep exploitation and the deep disposal of waste. Here, we present detailed isotope and geochemical profiles of porewaters and methane from an Ordovician shale and carbonate aquiclude on the eastern flank of the Michigan Basin, where...