Pleistocene glaciers, lakes, and floods in north-central Washington State

2018 ◽  
Author(s):  
Richard B. Waitt
Keyword(s):  
Washington State ◽  
North Central

Natural‐field and very low‐frequency tipper profile interpretation of contacts

Geophysics ◽  
1987 ◽  
Vol 52 (12) ◽  
pp. 1697-1707 ◽  
Author(s):  
Victor F. Labson ◽  
Alex Becker
Keyword(s):  
Numerical Models ◽  
Low Frequency ◽  
Washington State ◽  
Trial And Error ◽  
North Central ◽  
Natural Field ◽  
Very Low Frequency ◽  
Basement Faults ◽  
Vertical Contact ◽  
Metasedimentary Sequence

Anomalous vertical magnetic field (tipper) profiles acquired using natural or very low‐frequency (VLF) radio transmitter sources can be interpreted simply and rapidly for a number of geologic settings. The relations between computed numerical models, and outcropping dipping and buried vertical contacts are presented here in a series of interpretation charts. Use of the tipper phase in the analysis minimizes the effect of transmitter azimuth in the VLF case. Two examples illustrate the application to field data. An audiofrequency natural‐field tipper profile over a conductive bed in a north‐central Washington State metasedimentary sequence demonstrates the interpretation procedure for a dipping contact. VLF profiles over covered basement faults in Ontario demonstrate the application for a buried vertical contact. In both cases the quick results are in agreement with the much more laborious trial‐and‐error matching to two‐dimensional models.

Eocene Ginkgo leaf fossils from the Pacific Northwest

2002 ◽  
Vol 80 (10) ◽  
pp. 1078-1087 ◽  
Author(s):  
George E Mustoe
Keyword(s):  
British Columbia ◽  
Pacific Northwest ◽  
Ginkgo Biloba ◽  
Middle Eocene ◽  
Washington State ◽  
North Central ◽  
Lacustrine Deposits ◽  
South Central ◽  
The Pacific ◽  
Ginkgo Leaf

Middle Eocene lacustrine deposits in south-central British Columbia and north-central Washington state preserve two types of Ginkgo leaves. A morphotype characterized by deeply divided multiple lobes is herein described as Ginkgo dissecta sp.nov. Leaves that are either undivided or shallowly divided into bilobate symmetry are indistinguishable from foliage of extant Ginkgo biloba Linnaeus. These fossils contradict the widely held belief that only a single Ginkgo species, Ginkgo adiantoides (Unger) Heer, inhabited Cenozoic forests.Key words: British Columbia, Eocene, fossil, Ginkgo adiantoides, Ginkgo biloba, Ginkgo dissecta, McAbee, Republic, Tertiary, Washington.

scholarly journals First verified sighting of a Western Fence Lizard (Sceloporus occidentalis) in British Columbia, Canada

2020 ◽  
Vol 134 (3) ◽  
pp. 210-212
Author(s):  
Ron Farrell ◽  
Gavin Hanke ◽  
David Veljacic
Keyword(s):  
British Columbia ◽  
Baja California ◽  
Puget Sound ◽  
Washington State ◽  
The West ◽  
West Side ◽  
Sceloporus Occidentalis ◽  
North Central ◽  
Western Fence Lizard

Western Fence Lizard (Sceloporus occidentalis) is known from Baja California, Mexico, north to north-central Washington State, including Puget Sound, where scattered populations extend from the Cherry Point area south to Tacoma and along the west side of Puget Sound to Port Townsend. On 6 June 2020, a single juvenile S. occidentalis was photographed in a Cloverdale area garden, Surrey, British Columbia, representing the first verified sighting of this species in Canada. No other S. occidentalis were sighted in the area, and we could not determine how the specimen entered the province.

Stromatoporoids from the Famennian (Devonian) Wabamun Formation, Normandville oilfield, north–central Alberta, Canada

1988 ◽  
Vol 62 (03) ◽  
pp. 411-419 ◽  
Author(s):  
Colin W. Stearn
Keyword(s):  
Patch Reef ◽  
Abundant Species ◽  
The Other ◽  
North Central ◽  
Biotic Crisis

Stromatoporoids are the principal framebuilding organisms in the patch reef that is part of the reservoir of the Normandville field. The reef is 10 m thick and 1.5 km2in area and demonstrates that stromatoporoids retained their ability to build reefal edifices into Famennian time despite the biotic crisis at the close of Frasnian time. The fauna is dominated by labechiids but includes three non-labechiid species. The most abundant species isStylostroma sinense(Dong) butLabechia palliseriStearn is also common. Both these species are highly variable and are described in terms of multiple phases that occur in a single skeleton. The other species described areClathrostromacf.C. jukkenseYavorsky,Gerronostromasp. (a columnar species), andStromatoporasp. The fauna belongs in Famennian/Strunian assemblage 2 as defined by Stearn et al. (1988).

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