The phrase "a coeval" is correct and usable in written English.
It can be used to refer to something or someone that is of the same age or era as another.
Example: "The fossils found in the excavation site were coeval with the dinosaurs that roamed the Earth millions of years ago."
Alternatives: "a contemporary" or "a peer".
An apparent absence of a coeval unconformity in western North America seems to be an anomaly.
The regressive portion of the Le Castella terrace deposits, developed during a relative sea-level highstand and falling stage, consists of a progradational wedge mainly composed of redistributed skeletal particles of a coeval shallow water carbonate factory.
A fully fluvial system occurs in the southern portion of the Bahariya Oasis, including depositional products of meandering and braided streams, and a coeval fluvio-marine setting is dominant to the north.
The lesson repeats itself: a convincing theory of truth-makers requires a coeval theory of truth bearers.
Although the activity level seems to diminish eastward, Itoh et al. (1997, 2006) showed a coeval deformation on the eastern SWJ backarc.
At Playa Grandi, northeast Bonaire, a coeval deposit was interpreted as tsunamigenic based on taphonomic characteristics and the comparison with the marginal sediment input during recent hurricanes (Engel et al., 2010).
It is also worth considering actions that aid a focal coeval male at a cost to other coeval males and females.
Penrod Shoes issued a giveaway coeval edition of Boys' Ranch #5 and #6, and the same issues were reprinted by Harvey Thriller in Witches Western Tales (1955) #29 30, with further reprints in Western Tales #31 32.
These thresholds are generally higher than in Table 4 (i.e. favor the focal female less) because the benefit is going to a female coeval instead of to self (except for the maternal thresholds, which are identical because it is the same fitness tradeoff from the mother's point of view).
Furthermore, a trench excavated 30 m east of that rivercut unearthed the older rupture of the 1255 AD event (Fig. 2; see detrital charcoal ages and corresponding analysis in (Sapkota et al., 2013; Bollinger et al., 2014) for additional clues deduced from an abandoned coeval paleochannel).
On satellite images the morphology of the river terminus has a divergent pattern and resembles a network of coeval sinuous distributary channels.
