Add Yahoo as a preferred source to see more of our stories on Google. A shallow marine inversion kept polluted air trapped in the L.A. Basin for days. (Paul Duginski / Los Angeles Times) One good ...

The more distal position and symmetric shape of the associated shallow, marginal troughs show that the Palaeocene inversion phase was more gentle and dome-like than the Late Cretaceous phase. We ...

The base of the Donbas foldbelt sedimentary succession is clearly distinguishable in the seismic section as a band of strong reflections, indicative of Middle Devonian pre-rift sedimentary rocks, ...