A Tidally Influenced, High-Latitude Coastal-Plain<subtitle>The Upper Cretaceous (Maastrichtian) Prince Creek Formation, North Slope, Alaska</subtitle>

Use of multiple oxygen isotope proxies for elucidating Arctic Cretaceous palaeo-hydrology

“…The PCF is an alluvial succession deposited on a tidally influenced, high-latitude coastal plain in what is now known as the Colville Basin (Flaig et al 2011). These sediments were shed during the rise of the ancestral Brooks Range (Fig.…”

“…The PCF was deposited on a high-latitude Arctic coastal plain (Flaig et al 2011). Occasional marine transgression and marine influence on sedimentation is evidenced by the tidal influence in fluvial deposits and the presence of jarosite, pyrite and gypsum (as a pyrite weathering product), all of which increase in abundance up-section near the contact between the PCF and the overlying Schrader Bluff Formation (Flaig 2010;Flaig et al 2011).…”

“…Occasional marine transgression and marine influence on sedimentation is evidenced by the tidal influence in fluvial deposits and the presence of jarosite, pyrite and gypsum (as a pyrite weathering product), all of which increase in abundance up-section near the contact between the PCF and the overlying Schrader Bluff Formation (Flaig 2010;Flaig et al 2011). PCF palaeoenvironments include meandering trunk channels, meandering and fixed distributary channels, crevasse splays, levees, swamps, small lakes and ponds, and poorly developed palaeosols with redoxomorphic features (Fiorillo et al 2010a;Flaig 2010;Flaig et al 2011). Trunk channel are 13+-m-thick, fining-upward successions containing basal lags with trough cross-bedded sandstones, inclined heterolithic stratification (IHS), convolute bedding, isolated bone fragments, logs, wood impressions and plant fragments (Flaig et al 2011).…”

An ornithomimosaurian from the Upper Cretaceous Prince Creek Formation of Alaska

“…The Prince Creek Formation (formerly referred to as the Kogosukuruk Tongue of the PCF; Gryc et al 1951) is composed of non-marine sandstone, conglomerate, coal, and mudstone layers representing interbedded fluvial (meandering channels and floodplains) and marginal marine sediments that were deposited on a low gradient coastal plain (Mull et al 2003;Flaig et al 2011). Palynological (Frederiksen et al 1988(Frederiksen et al , 2002Frederiksen 1991) and biostratigraphic data (Brouwers and Deckker 1993) suggest the entire PCF ranges from the Upper Cretaceous to Eocene in age.…”

Dinosaur-Bearing Hyperconcentrated Flows of Cretaceous Arctic Alaska: Recurring Catastrophic Event Beds on a Distal Paleopolar Coastal Plain

“…Comment on "A new Arctic hadrosaurid from the Prince Creek Formation (lower Maastrichtian) of northern Alaska" by Hirotsugu Mori, Patrick S. Druckenmiller, and Gregory M. Erickson ANTHONY R. FIORILLO Recently Mori et al (2016) published a paper describing a new taxon of hadrosaurid dinosaur from the Upper Cretaceous Prince Creek Formation of the North Slope Alaska, a rock unit that has recently proven to be a productive source of scientific insights into the workings of an ancient Arctic terrestrial ecosystem (Fiorillo and Gangloff 2001;Gangloff et al 2005;Fiorillo et al 2009Fiorillo et al , 2010Gangloff and Fiorillo 2010;Flaig et al 2011Flaig et al , 2013Flaig et al , 2014Tykoski 2012, 2014). Although thorough testing of the systematics of this proposed taxon will occur over the next few years, one statement in the Mori et al (2016) paper warrants comment now.…”