A NEW RACE OF PAPILIO BELONGING TO THE MACHAON COMPLEX

1939 ◽  
Vol 71 (10) ◽  
pp. 216-217 ◽  
Author(s):  
J. McDunnough
Keyword(s):  
Red Deer ◽  
River Valley ◽  
General Region ◽  
New Race ◽  
Collection Time

For years several specimens of a Papilio form from Alberta, allied to oregonia Edw., have stood apart in the Canadian National Collection. Time and again I have puzzled over them but could never make them fit exactly under any of the existing names. Three of the series (males) came to us with the Wolley-Dod collection and were captured in 1905 in the bad lands of the Red Deer River Valley, somewhere near Drumheller; a fourth specimen (a female) was taken in the same general region in 1917 by C. H. Young.

Palynostratigraphic zonation of Paleocene strata in the central and south-central Alberta Plains

1990 ◽  
Vol 27 (10) ◽  
pp. 1263-1269 ◽  
Author(s):  
Thomas D. Demchuk
Keyword(s):  
Coal Seam ◽  
River Basin ◽  
Red Deer ◽  
River Valley ◽  
Lower Portion ◽  
Wind River Basin ◽  
South Central

Paleocene strata of the Scollard and Paskapoo formations in the central and south-central Alberta Plains can be subdivided into five formal biostratigraphic zones, based in part on a Momipites–Caryapollenites palynofloral lineage. A similar zonation previously identified from strata of the Wind River basin in Wyoming displays similar palynomorph occurrences. However, differences that are present are likely a result of latitudinal climatic zonation between Alberta and Wyoming during Paleocene time.Lowermost Paleocene strata of Alberta (Wodehouseia fimbriata Zone) are barren of Momipites species, which subsequently first appear in the Momipites wyomingensis Zone. These two zones include strata from the Cretaceous–Tertiary boundary (Nevis coal seam) to the top of the Scollard Formation. A diverse assemblage of Momipites spp. plus Aquilapollenites spinulosus, Caryapollenites prodromus, and Tiliaepollenites danei are present in the Aquilapollenites spinulosus Zone within the lowermost Paskapoo Formation. Two more species of Caryapollenites appear in the Caryapollenites wodehousei Zone. The Pistillipollenites mcgregorii Zone is characterized by the presence of Pistillipollenites mcgregorii, Insulapollenites rugulatus, and Caryapollenites inelegans. Momipites leffingwellii is absent from the lower portion of this zone, with Momipites waltmanensis, Momipites actinus, and Momipites triorbicularis absent from the upper portion. Lower P. mcgregorii Zone strata are the youngest strata encountered in the vicinity of the Red Deer River valley. Upper P. mcgregorii Zone strata include strata of the Obed–Marsh coal zone within the uppermost part of the Paskapoo Formation adjacent to the Alberta Foothills.

A new crocodylian (Archosauria) from the basal Paleocene of the Red Deer River Valley, southern Alberta

2001 ◽  
Vol 38 (12) ◽  
pp. 1689-1704 ◽  
Author(s):  
Xiao-Chun Wu ◽  
Donald B Brinkman ◽  
Richard C Fox
Keyword(s):  
New Species ◽  
Late Cretaceous ◽  
Red Deer ◽  
River Valley ◽  
Additional Information ◽  
Southern Alberta ◽  
Incisive Foramen

Borealosuchus griffithi, sp. nov., is described on the basis of an incomplete skeleton from the basal Paleocene, southern Alberta. This new species records one of a few basal Cenozoic occurrences of Crocodylia so far known. B. griffithi is most distinctive in having a markedly laterally concavo-convex snout; a deep, elongate recess or fossa on the anteroventral surface of the jugal; and a large, nearly rectangular incisive foramen. Within Borealosuchus, B. griffithi probably takes a "more crownward" position than does B. sternbergii of the late Late Cretaceous. With additional information from the new species, the diagnosis of Borealosuchus is revised.

Evidence for an unconformity at the Scollard–Battle contact, Upper Cretaceous strata, Alberta

1983 ◽  
Vol 20 (8) ◽  
pp. 1219-1231 ◽  
Author(s):  
Loris S. Russell
Keyword(s):  
Coal Seam ◽  
Upper Cretaceous ◽  
Red Deer ◽  
River Valley ◽  
Marked Contrast ◽  
Volcanic Origin ◽  
Lower Member ◽  
Horseshoe Canyon Formation

The Scollard Formation is the uppermost division of the Edmonton Group in the Red Deer River valley of central Alberta. It dates from the close of Cretaceous and the beginning of Tertiary time. It rests on a very distinctive clay sequence consisting in descending order of the Battle and Whitemud formations, which overlie in turn the Horseshoe Canyon Formation, the lowest division of the Edmonton Group. Near the top of the Battle Formation is a distinctive and widespread bed of volcanic origin (Kneehills Tuff). The contact of the Battle clay above this bed with the Scollard Formation varies in level within single exposures. A widespread coal seam (Ardley or No. 14) divides the Scollard Formation into lower and upper members. The thickness of the lower member decreases markedly from south to north, as does the level of the highest recognized dinosaur remains. There is a marked contrast between the dinosaur fauna of the lower Scollard Member and that of the Horseshoe Canyon Formation. A similar break has been observed in the floral succession. These physical and biological discordances at the Scollard–Battle contact are taken to indicate an interval of non-deposition, with or without erosion. Evidence for an analogous break occurs in southwestern and southeastern Alberta and in southern Saskatchewan.

The Dorothy bentonite: an extraordinary case of secondary thickening in a late Campanian volcanic ash fall in central Alberta

2002 ◽  
Vol 39 (12) ◽  
pp. 1745-1754 ◽  
Author(s):  
J F Lerbekmo
Keyword(s):  
British Columbia ◽  
Refractive Index ◽  
Volcanic Ash ◽  
Red Deer ◽  
Silica Content ◽  
River Valley ◽  
Ash Fall ◽  
Isopach Map ◽  
Thickness Measurements ◽  
Glass Shards

The late Campanian (~73 Ma) Dorothy bentonite outcrops in the marine Bearpaw Shale for 20 km along the Red Deer River valley east of Drumheller, Alberta, and is up to 13.5 m thick. An isopach map based upon 230 sub surface and surface thickness measurements illustrates an elongated southwest–northeast lobe with maximum dimensions of about 300 km by 50 km. The volume is ~57 km3 distributed within an area of ~11 000 km2. This bentonite is the altered product of what is believed to be a short-lived Plincan-type eruption from part of the Howell Creek Instrusives in southeastern British Columbia. Fortuitous preservation of the original ash in an up to 2.5 m thick calcite-cemented tuffaceous zone near the middle of the bentonite shows the original ash to have been >99% glass shards and pumice. The remainder of the ash is a crystal component consisting mostly of plagioclase and biotite. The silica content of the isotropic glass shards of about 77%, and a refractive index of 1.503 ± 0.001, suggest a magma of rhyolitic composition.

First high-precision U–Pb CA–ID–TIMS age for the Battle Formation (Upper Cretaceous), Red Deer River valley, Alberta, Canada: implications for ages, correlations, and dinosaur biostratigraphy of the Scollard, Frenchman, and Hell Creek formations

2019 ◽  
Vol 56 (10) ◽  
pp. 1041-1051 ◽  
Author(s):  
David A. Eberth ◽  
Sandra L. Kamo
Keyword(s):  
High Precision ◽  
Upper Cretaceous ◽  
Red Deer ◽  
Sediment Accumulation ◽  
River Valley ◽  
Hell Creek Formation ◽  
Type Area ◽  
Minimum Age ◽  
Land Vertebrate ◽  
Age Range

The Battle Formation (BFm) is a widespread Upper Cretaceous marker horizon in western Canada that records a time of low sediment input and marks the boundary between the Edmontonian and Lancian land-vertebrate ages. Here, we present the first high-precision U–Pb CA–ID–TIMS age of 66.936 ± 0.047/0.060/0.140 Ma for the Battle bentonite, an altered vitric ash in the upper portion of the BFm at Knudsen’s Farm in the Red Deer River valley of Alberta. This age supersedes those previously reported, confirms that rates of sediment accumulation for the formation were very low (∼1.40 cm/ka), and allows us to interpolate an age range of ∼66.88–67.20 Ma for the BFm. Our data also provide a maximum age of ∼66.88 Ma for the base of the overlying Scollard Formation, a dinosaur-rich unit. We combine our age data with calibrated magneto- and palynostratigraphic data to assess chronostratigraphic correlations among the Scollard Formation of Alberta, the Frenchman Formation of Saskatchewan, and the Hell Creek Formation in eastern Montana. Whereas the combined data support previous interpretations that equate the age ranges of the Scollard Formation, Frenchman Formation, and the upper one third of the Hell Creek Formation in eastern Montana, they also indicate that all of the lower one third (L3) and part of the middle one third (M3) of the Hell Creek Formation in Montana are chronostratigraphically equivalent to all or part of the sub-BFm unconformity and the BFm in Alberta. Accordingly, a minimum age of ∼67.20 Ma is assessed for the base of the Hell Creek Formation in its type area.

THE THICK-HEADED CERATOPSIAN DINOSAUR PACHYRHINOSAURUS (REPTILIA: ORNITHISCHIA), FROM THE EDMONTON FORMATION NEAR DRUMHELLER, CANADA

1967 ◽  
Vol 4 (1) ◽  
pp. 171-186 ◽  
Author(s):  
Wann Langston Jr.
Keyword(s):  
Red Deer ◽  
River Valley

Pachyrhinosaurus, hitherto known from the lower Edmonton facies of the Lethbridge district in Alberta, Canada, has recently been discovered in correlative rocks in the Red Deer River valley, near Drumheller. An incomplete skull referred to Pachyrhinosaurus of. P. canadensis Sternberg is better preserved than others previously described. It reveals basic resemblances between this genus and certain ceratopsids (Centrosaurus: Styracosaurus) with short squamosals, deep faces, and wide uncomplicated narial apertures; the frill was fenestrated. Packyrhinosaurus is best placed in the Ceratopsidae, where it is unique in the possession of a massive nasofrontal boss in place of the usual nasal horn.

Electron Diffraction of Wet Biological Membranes

1974 ◽  
Vol 32 ◽  
pp. 158-159
Author(s):  
S.W. Hui ◽  
D.F. Parsons
Keyword(s):  
Electron Diffraction ◽  
Data Collection ◽  
Biological Membranes ◽  
Small Areas ◽  
Electron Diffraction Technique ◽  
Electron Microscopes ◽  
Collection Time ◽  
Camera Length

The development of the hydration stages for electron microscopes has opened up the application of electron diffraction in the study of biological membranes. Membrane specimen can now be observed without the artifacts introduced during drying, fixation and staining. The advantages of the electron diffraction technique, such as the abilities to observe small areas and thin specimens, to image and to screen impurities, to vary the camera length, and to reduce data collection time are fully utilized. Here we report our pioneering work in this area.

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