| 词条 | Allenby Formation |
| 释义 |
| name = Allenby Formation | period = Eocene | age = {{fossilrange|52.5|48}} | image = | imagesize = | caption = | type = Geological formation | prilithology = Fluvial deposits | otherlithology = shale–sandstone, coal–breccia, and coal–chert | namedfor = Allenby, British Columbia (Shaw, 1952) | namedby = | region = British Columbia | country = Canada | coordinates = {{Coord|49|22.6|N|120|32.8|W|display=title,inline}} | unitof = | subunits = Princeton Chert | underlies = | overlies = | thickness = 1860-2100 m.[1] | extent = | area = 300 km².[1] | map = | map_caption = }}{{see also|Princeton Chert}} The Allenby formation is a sedimentary rock formation deposited during the early to early Middle Eocene. It consists of conglomerates, sandstones with interbedded with shales and coal. The coal seams contain an abundance of insect, fish and plant fossils, known from the shales since 1877[1][2][3] but best known from the Princeton Chert.[4] The following fossil genera and species have been described from the Allenby formation:
References1. ^Penhallow, D.P. 1908. A report on Tertiary plants of British Columbia, collected by Lawrence M. Lambe in 1906 together with a discussion of previously recorded Tertiary floras. Canada Department of Mines, Geological Survey Branch, No. 1013. pp. 1–167. 2. ^Dillhoff, R.M., Dillhoff, T.A., Greenwood, D.R., DeVore, M.L., and Pigg, K.B. 2013. The Eocene Thomas Ranch flora, Allenby Formation, Princeton, British Columbia, Canada. Botany, 91: 514–529. doi:10.1139/cjb-2012-0313. 3. ^Greenwood, D.R., Pigg, K.B., Basinger, J.F., and DeVore, M.L. 2016. A review of paleobotanical studies of the Early Eocene Okanagan (Okanogan) Highlands floras of British Columbia, Canada, and Washington, U.S.A. Canadian Journal of Earth Sciences, 53(6): 548–564. doi:10.1139/cjes-2015-0177. 4. ^1 2 {{cite journal |last1=Mustoe |first1=G.E. |title=Cyclic sedimentation in the Eocene Allenby Formation of south-central British Columbia and the origin of the Princeton Chert fossil beds |journal=Canadian Journal of Earth Sciences |date=1 January 2011 |volume=48 |issue=1 |pages=25–43 |doi=10.1139/E10-085|url=http://www.nrcresearchpress.com/doi/full/10.1139/E10-085#.USj8EqVhXlY}} 5. ^{{cite journal|last=Wolfe|first=J.A.|last2=Wehr |first2=W.C. |year=1988 |title=Rosaceous Chamaebatiaria-like foliage from the Paleogene of western North America |journal=Aliso |volume= 12 |issue=1 |pages= 177–200 |url= https://pubs.er.usgs.gov/publication/70014287}} 6. ^Russell, L.S. 1935. A middle Eocene mammal from British Columbia. American Journal of Science, 29: 54–55. 7. ^Eberle, J.J., & Greenwood, D.R. (2017). An Eocene brontothere and tillodonts (Mammalia) from British Columbia, and their paleoenvironments. Canadian Journal of Earth Sciences, 54(9): 981-992. 8. ^{{cite journal |last1=Denk |first1=T. |last2=Dillhoff |first2=R.M. |year=2005 |title=Ulmus leaves and fruits from the Early-Middle Eocene of northwestern North America: systematics and implications for character evolution within Ulmaceae |journal=Canadian Journal of Botany |volume=83 |issue=12 |pages=1663–1681 |doi=10.1139/b05-122 |url=http://www.evolvingearth.org/learnearthscience/ulmus2005.pdf |access-date=2017-03-02 |archive-url=https://web.archive.org/web/20170809120712/http://www.evolvingearth.org/learnearthscience/ulmus2005.pdf |archive-date=2017-08-09 |dead-url=yes |df= }} 2 : Geology of British Columbia|Allenby Formation |
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