The steeply dipping beds of blocky mudstone give an interesting asymmetry to this miniature canyon, with the smooth erosion surface on the southern side countered by jagged exposed strata to the north.
Ouachita orogeny, a mountain-building event that resulted in the folding and faulting of exposed strata in the Ouachita Geosyncline in the southern portion of the United States in Arkansas, Oklahoma, and the Marathon uplift region of West Texas.
Updated magnetostratigraphy coupled with previously published geochronology indicates that all exposed strata were deposited over a ~ 277 kyr interval within chron C3An.2n from ~ 6.42 6.70 Ma.
The Pont de Montanyana outcrop exposes strata of the lower Eocene Montllobat Formation deposited in alluvial plains and in meandering river systems of the Tremp-Graus piggyback basin (Southern Pyrenees, Spain).
Exposed fossiliferous strata are now classified as belonging to a particular Silurian time interval so long as they correlate with fossils diagnostic of the appropriate stratotype in the United Kingdom or the Czech Republic.
We differentiate between a subaerial erosion of exposed hinterland strata and a submarine abrasion of sediments.
Ordered character states for foraging niche (subterranean – leaf-litter – surface swarm raiding) were assumed in all analyses, because it is most plausible that army ants adapt only gradually to more exposed foraging strata.
Individuals are not weighted, but the maximum likelihood estimate is a weighted mean of the stratum-specific estimates: where provided that there is at least one death among the unexposed and one death among the exposed within each stratum.
To put the matter in archaeological terms, it exposes three strata.
However lamotrigine did show superiority to placebo in the neurotoxic ARV-exposed stratum in a secondary outcome measure, mean improvement in VAS (0 100mm) baseline to end of treatment: lamotrigine: −27.1; compared to placebo: −9.0; p = 0.003.
