In the most complete and first radiometrically dated Precambrian-Cambrian transition strata along the Khorbusuonka River in northern Siberia, a succession of fossilized traces of activity of the earliest infaunal animals has been identified. As supplemented by a similar record in Podolia, the Ukraine and elsewhere. This collection demonstrates that thus far all of the structurally identifiable ...

Abstract Trace fossils record foraging behaviors, the search for resources in patchy environments, of animals rock record. Quantification strength, density, and nature behaviors enables investigation how these may have changed through time. Here, we present a novel approach to explore such patterns using spatial point process analyses quantify scale strength ichnofossil distributions on horizon...

Vertical changes in distribution, abundance, and ichnodiversity of ichnocoenoses in alluvial deposits of the Willwood Formation suggest significantly drier moisture regimes in the Bighorn Basin, Wyoming, during the Paleocene–Eocene Thermal Maximum (PETM), a transient period of global warming. The Willwood Formation at Polecat Bench contains an abundant assemblage of ichnofossils, including vari...

We report on results from surveys undertaken in Sumatra during 2018 and 2019. The had three objectives: (1) to examine, sample, record the extensive Quaternary fossil deposits caves West Sumatra; (2) determine potential for fluvial Riau Jambi provinces; (3) relocate proboscidean remains reported Bangka Island. Our produced several significant results. mapped important Padang Highland caves, Nga...

This study documents the traces and burrowing behaviors of nymphs of the prairie cicada Cicadetta calliope (Hemiptera: Cicadidae), as observed in neoichnological experiments. Cicada nymphs were collected from the C horizons of sandy Fluvents along the Kansas River east of Lawrence, Kansas. The nymphs appeared to be fifth instars, 13–17 mm long and 6–7 mm wide. Nymphs were placed in plastic encl...