Along the stream course, a recent Quaternary deposit consisting mostly if clayey soil/alluvium of yellowish gray to khaki gray color with iron nodules along with sandy sludge of medium to coarse grain size with pebbles and boulders bed at the base are observed (Sen and Vijaya 2005; Mondal et al. 2014).
The pebble conglomerate bed at the base of the Cucaracha Formation represents a fluvial-channel deposit that is broadly distributed (based on its geometry and sedimentology, which are typical of fluvial-channel deposits [62], [63]).
The deep type is found at the muddy bed at the base of forereef of inside and mid reefs and largely confined to deep areas with low water motion patterns, high sediment transport and lower light levels.
In addition, our work in the park demonstrates that the transition between characteristic elements of the Adamanian and Revueltian vertebrate faunas occurs low in the Jim Camp Wash beds, not at the base of the Jasper Forest bed and Rainbow Forest Bed [70].
For reasons that we will discuss in a future paper, we agree with Parker [7] that the uppermost Mesa Redondo Member forms the reddish beds exposed at the base of the Blue Mesa Member in PEFO (contra [14], [39], [40]), and we disagree with Demko's [47], [48] referral of the lower part of the overlying Blue Mesa Member to the Monitor Butte Member.
We informally refer to resistant sandstones occurring below the top of the Martha's Butte beds, including at the base as of the unit, as "lower Flattops One sandstones", and to resistant sandstones at the top of the Martha's Butte beds as "upper Flattops One sandstones".
RADOM, Poland — Freshly shorn recruits craned their necks shyly, trying to find their names on the rows of metal bunk beds at the air base here last week.
According to their taphonomic features and taxonomic composition, the hiatal shell concentrations occurring within the PBM may be grouped into two main types, each of which occupies a predictable stratigraphic position within the sequences: current/wave-winnowed beds at the cycle base and community shell concentrations in a roughly mid-cycle position.
A ~2 m thick tuffaceous Wangpo bed occurs at the base of the Wujiaping Formation.
Defining the formation boundaries is largely based on the study of thin limestone beds commonly located at the base of the formation.
