Foraminiferal inventory and lithologic description of the Lower Cretaceous (Albian) Hulcross Shale, Monkman area, northeastern British Columbia

1988 ◽  
Vol 25 (5) ◽  
pp. 793-798 ◽  
Author(s):  
C. R. Stelck ◽  
Dale Leckie
Keyword(s):  
British Columbia ◽  
Water Column ◽  
Lower Cretaceous ◽  
Volcanic Ash ◽  
Peace River ◽  
Low Degree ◽  
Bottom Waters

Correlation of an arenaceous microfauna of 41 species (44 subspecies) from the Hulcross Formation of the Monkman Pass area with that found in the Hulcross Shale on the Peace River has a further corroboration in matching spectra of volcanic ash beds at both localities. The Monkman Pass equivalents of both the basalmost portion and the upper part of the Hulcross beds on the Peace River are in sandy to continental facies. Diatoms are plentiful in the Monkman Pass section in the shaly facies.The foraminiferal genera include Bathysiphon, Thuramminoides, Psammosphaera, Hippocrepina, Saccammina, Reophax, Glomospira, Ammodiscus, Psamminopelta, Haplophragmoides, Ammobaculites, Trochammina, Textulariopsis, Pseudobolivina, Verneuilinoides, Uvigerinammina, Gaudryina, Eggerella, and Dorothia. Only Thuramminoides, Haplophragmoides, and Trochammina occur in abundance, indicating water of depth around 100 m at time of deposition and of salinity close to that of normal seawater. The low degree of bioturbation and the presence of Chondrites in the lower Hulcross suggest that poorly oxygenated bottom waters prevailed. Upwards, the diversity and abundance of bioturbation increase, indicating higher oxygenation contents caused by better circulation. As such, the Hulcross basin had a stratified water column.

The walking speed of dinosaurs from the Peace River Canyon, British Columbia, Canada

1981 ◽  
Vol 18 (4) ◽  
pp. 823-825 ◽  
Author(s):  
Richard Kool
Keyword(s):  
British Columbia ◽  
Lower Cretaceous ◽  
Walking Speed ◽  
Peace River

The walking speed of seven dinosaur ichnospecies from the Lower Cretaceous Peace River Canyon, British Columbia, Canada, have been determined. The speeds range from approximately 1 to 3 m s−1 (4–10 km h−1).

Lower cretaceous dinosaur footprints from the peace River Canyon, British Columbia, Canada

1979 ◽  
Vol 28 ◽  
pp. 103-115 ◽  
Author(s):  
Philip J. Currie ◽  
William A.S. Sarjeant
Keyword(s):  
British Columbia ◽  
Lower Cretaceous ◽  
Peace River

Foraminifera of the middle to upper Albian transition (Lower Cretaceous), northeastern British Columbia

1991 ◽  
Vol 28 (4) ◽  
pp. 561-580 ◽  
Author(s):  
C. R. Stelck
Keyword(s):  
British Columbia ◽  
New Species ◽  
Water Depth ◽  
Lower Cretaceous ◽  
Sharp Reduction ◽  
New Subspecies ◽  
Peace River ◽  
Two New Species ◽  
Peace River Arch

Throughout Alberta and Saskatchewan, the upper Albian Substage lies unconformably on subjacent beds. However, on the Peace River in northeastern British Columbia, 32 km below Hudson Hope, a silty shale outcrop shows uninterrupted marine deposition across the Middle–Upper Albian substage boundary. An arenaceous foraminiferal fauna of 21 genera and 57 sub-generic taxa is illustrated from this outcrop of the Hasler Shale. The collections come from above the previously illustrated microfauna of the Stelckiceras liardense Zone and below the occurrence of Haplophragmoides gigas gigas and provide a spectrum of transitional faunules spanning the middle–upper Albian boundary. The corresponding boundary of the Ammobaculites wenonahae Subzone of the Gaudryina nanushukensis Zone with the overlying Haplophragmoides uniorbis Subzone (new) at the base of the Haplophragmoides gigas Zone is defined at 73 m above the top of the Cadotte Sandstone by the disappearance of A. wenonahae. Genera within the upper part of the A. wenonahae Subzone and the H. uniorbis Subzone include Bathysiphon, Saccammina, Pelosina, Hippocrepina, Psammosphaera, Thuramminoides, Ammodiscus, Miliammina, Psamminopelta, Reophax, Scherochorella, Haplophragmoides, Ammobaculites, Bulbophragmium, Ammobaculoides, Textulariopsis, Pseudobolivina, Trochammina, Gravellina, Eggerella, and Verneuilinoides. Two new species and two new subspecies are established, viz. Ammobaculites kokei, Trochammina bredini, Haplophragmoides gigas Cushman pregigas, and Reophax deckeri Tappan sliteri. Species originally described from the upper Albian of Wyoming, such as Haplophragmoides uniorbis Eicher, originated out of boreal stock, as they are recognized within the middle Albian upper A. wenonahae Subzone north of the Peace River Arch. On the Peace River, the passage from middle Albian to upper Albian is marked by water depth at or below wave base, but regression is reflected at the substage boundary by the sharp reduction in variety of taxa.

Foraminifera of a Joli Fou Shale equivalent in the Lower Cretaceous (Albian) Hasler Formation, northeastern British Columbia

1985 ◽  
Vol 22 (9) ◽  
pp. 1299-1313 ◽  
Author(s):  
Kory R. Koke ◽  
C. R. Stelck
Keyword(s):  
British Columbia ◽  
Lower Cretaceous ◽  
Rocky Mountain ◽  
Sensu Stricto ◽  
Peace River ◽  
The North ◽  
North Side ◽  
Basal Portion ◽  
Peace River Arch ◽  
North And South

The discovery of the arenaceous foraminifer Haplophragmoides gigas Cushman in the Hudson Hope area of northeastern British Columbia indicates that the Early Cretaceous (Albian) Joli Fou Sea flooded around the north side of the Peace River Arch, making an embayment that penetrated as far west as the Rocky Mountain Foothills. The microfauna of 25 genera and 46 species of arenaceous foraminifers is illustrated carrying Bathysiphon spp., Hippocrepina sp., Hyperammina spp., Lituotuba? sp., Psammosphaera spp., Reophax spp., Ammodiscus spp., Glomospira sp., Miliammina spp., Psamminopelta spp., Trochamminoides sp., Haplophragmoides spp., Ammomarginulina sp., Ammobaculites spp., Haplophragmium spp., Trochammina spp., Textulariopsis sp., Pseudobolivina spp., Plectorecurvoides sp., Verneuilina sp., Gaudryina sp., Uvigerinammina sp., Gravellina sp., and Eggerella sp.The suite occurs in the lower part of the Hasler Shale of the Fort St. John Group about 10–20 m above beds carrying a microfauna of the Ammobaculites wenonahae Subzone (= Stelckiceras liardense ammonite Zone) present in the basal portion of the Hasler Shale. The Haplophragmoides gigas Zone sensu stricto is overlain by a sequence of silty beds (Viking equivalent?), which in turn is succeeded by the Miliammina manitobensis Zone microfauna. The H. gigas assemblage has both boreal and southern aspects, suggesting a mixing of the waters from north and south as the first expression of the Colorado Sea in earliest late Albian time. The assemblage is a deep neritic one and lacks any calcareous component. Diagnostic megafauna are lacking.

Nearshore articulate crinoid from the Albian of Alberta, Canada (Early Cretaceous, Echinodermata)

2011 ◽  
Vol 48 (4) ◽  
pp. 719-727 ◽  
Author(s):  
William I. Ausich ◽  
Robin A. Buckley ◽  
A. Guy Plint
Keyword(s):  
British Columbia ◽  
Early Cretaceous ◽  
Lower Cretaceous ◽  
Upper Cretaceous ◽  
Distal Portion ◽  
Peace River ◽  
The North ◽  
Facies Change ◽  
Northern Alberta ◽  
Facies Transition

During the middle Albian, a southward incursion of the Boreal Ocean flooded northern Alberta and adjacent British Columbia, forming a large embayment known as the Hulcross Sea. Marine mudstones of the Hulcross Formation and Harmon Member of the Peace River Formation record transgression, whereas sandstones of the Cadotte Member of the Peace River Formation record shoreline regression to the north. Abundant hummocky and swaley lamination in the Cadotte sandstone attest to the influence of storms on a shallow shelf. The Cadotte sandstone undergoes a lateral facies change from mud-free shoreface sandstone in the south to heterolithic offshore facies in the north. An articulated crinoid was found within a hummocky sandstone bed about 15 km seaward (north) of the shoreface-shelf facies transition. The articulated state of the crinoid indicates that it was buried very rapidly, and never exhumed. The arms through 20 mm of the column are preserved, but because the details of the aboral cup are not well preserved, this specimen must be left in open nomenclature. The elliptical columnals with a concave latus in the distal portion of the preserved column ally this specimen to the Bourgueticrinida, although with details of the aboral cup lacking and other characters atypical for Mesozoic bourgueticrinids, the Canadian specimen is placed in Bathycrinidae indeterminate. The oldest previously recorded bathycrinids were from the Upper Cretaceous (Maastrichtian), thus this report extends their range to the Lower Cretaceous (Albian).

Stelckiceras and other Gastroplitinae (Ammonitina), from the Albian (Lower Cretaceous) Fort St. John Group, Peace River area, northeastern British Columbia

1995 ◽  
Vol 32 (7) ◽  
pp. 977-992 ◽  
Author(s):  
C.R. Stelck
Keyword(s):  
British Columbia ◽  
New Species ◽  
Lower Cretaceous ◽  
Arctic Basin ◽  
The Arctic ◽  
Peace River ◽  
Two New Species

Stelckiceras Jeletzky, 1980 and Pseudopulchellia Imlay, 1961 emend. (J.A. Jeletzky in 1980) are illustrated from the Ammobaculites wenonahae Subzone of the Albian (Lower Cretaceous) Hasler Formation of the Fort St. John Group, on the Peace River in northeastern British Columbia. Species of Gastroplites McLearn, 1930, Pseudopulchellia Imlay, 1961, Pseudogastroplites Jeletzky, 1980, and Stotticeras Jeletzky, 1980 are illustrated from the Ammobaculites sp. and Haplophragmoides multiplum subzones of the subjacent Cadotte Member of the Boulder Creek Formation and the underlying Hulcross Formation. Two new species, Gastroplites bahani and Gastroplites jeletzkyi, are described. The presence of several Arctic exotic ammonites suggests that the middle Albian interior seaway was not entirely isolated from the Arctic basin. Numerous foraminifera are known to be common to both basins, and current inflow may have prevented endemic Gastroplites s.st. and Stelckiceras from migrating northward. Biostratigraphic conclusions by J.A. Jeletzky are supported by this study.

Dinosaur Tracks, Columbosauripus ungulatus (Saurischia: Coelurosauria), from the Dunvegan Formation (Cenomanian) of Northeastern British Columbia

1975 ◽  
Vol 12 (10) ◽  
pp. 1805-1807 ◽  
Author(s):  
John E. Storer
Keyword(s):  
British Columbia ◽  
Lower Cretaceous ◽  
Upper Cretaceous ◽  
Peace River ◽  
Dinosaur Tracks ◽  
Early Upper

Columbosauripus ungulatus Sternberg is identified from the Dunvegan Formation, Cenomanian (early Upper Cretaceous) of East Pine, northeastern British Columbia. The species was originally reported from the Gething Formation, Albian (late Lower Cretaceous) of Peace River canyon, British Columbia.

scholarly journals Butterflies of the Peace River Region of Alberta and British Columbia

Blue Jay ◽  
1994 ◽  
Vol 52 (2) ◽  
Author(s):  
Norbert G. Kondla ◽  
Edward M. Pike ◽  
Felix A. H. Sperling
Keyword(s):  
British Columbia ◽  
Peace River ◽  
River Region

scholarly journals Mechanisms of dissolved and labile particulate iron supply to shelf waters and phytoplankton blooms off South Georgia, Southern Ocean

2018 ◽  
Vol 15 (16) ◽  
pp. 4973-4993 ◽  
Author(s):  
Christian Schlosser ◽  
Katrin Schmidt ◽  
Alfred Aquilina ◽  
William B. Homoky ◽  
Maxi Castrillejo ◽  
...  
Keyword(s):  
Southern Ocean ◽  
Water Column ◽  
Mixed Layer ◽  
Surface Mixed Layer ◽  
Pore Waters ◽  
Phytoplankton Blooms ◽  
Faecal Pellets ◽  
South Georgia ◽  
Shelf Sediments ◽  
Bottom Waters

Abstract. The island of South Georgia is situated in the iron (Fe)-depleted Antarctic Circumpolar Current of the Southern Ocean. Iron emanating from its shelf system fuels large phytoplankton blooms downstream of the island, but the actual supply mechanisms are unclear. To address this, we present an inventory of Fe, manganese (Mn), and aluminium (Al) in shelf sediments, pore waters, and the water column in the vicinity of South Georgia, alongside data on zooplankton-mediated Fe cycling processes, and provide estimates of the relative dissolved Fe (DFe) fluxes from these sources. Seafloor sediments, modified by authigenic Fe precipitation, were the main particulate Fe source to shelf bottom waters as indicated by the similar Fe ∕ Mn and Fe ∕ Al ratios for shelf sediments and suspended particles in the water column. Less than 1 % of the total particulate Fe pool was leachable surface-adsorbed (labile) Fe and therefore potentially available to organisms. Pore waters formed the primary DFe source to shelf bottom waters, supplying 0.1–44 µmol DFe m−2 d−1. However, we estimate that only 0.41±0.26 µmol DFe m−2 d−1 was transferred to the surface mixed layer by vertical diffusive and advective mixing. Other trace metal sources to surface waters included glacial flour released by melting glaciers and via zooplankton egestion and excretion processes. On average 6.5±8.2 µmol m−2 d−1 of labile particulate Fe was supplied to the surface mixed layer via faecal pellets formed by Antarctic krill (Euphausia superba), with a further 1.1±2.2 µmol DFe m−2 d−1 released directly by the krill. The faecal pellets released by krill included seafloor-derived lithogenic and authigenic material and settled algal debris, in addition to freshly ingested suspended phytoplankton cells. The Fe requirement of the phytoplankton blooms ∼ 1250 km downstream of South Georgia was estimated as 0.33±0.11 µmol m−2 d−1, with the DFe supply by horizontal/vertical mixing, deep winter mixing, and aeolian dust estimated as ∼0.12 µmol m−2 d−1. We hypothesize that a substantial contribution of DFe was provided through recycling of biogenically stored Fe following luxury Fe uptake by phytoplankton on the Fe-rich shelf. This process would allow Fe to be retained in the surface mixed layer of waters downstream of South Georgia through continuous recycling and biological uptake, supplying the large downstream phytoplankton blooms.

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