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Allenby Formation facts for kids

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For Allenby Coal member, see Carbondale Formation.
See also: Princeton Chert
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Allenby Formation
Stratigraphic range: Ypresian
52.5–48Ma
Type Geological formation
Unit of Princeton Group
Sub-units Princeton Chert, Vermillion Bluffs Shale
Area 300 km2 (120 sq mi)
Thickness 1,860–2,100 m (6,100–6,890 ft)
Lithology
Primary Shale, sandstone
Other Coalbreccia, coal–chert
Location
Coordinates 49°22.6′N 120°32.8′W / 49.3767°N 120.5467°W / 49.3767; -120.5467Coordinates: 49°22.6′N 120°32.8′W / 49.3767°N 120.5467°W / 49.3767; -120.5467
Approximate paleocoordinates 53°06′N 107°30′W / 53.1°N 107.5°W / 53.1; -107.5
Region British Columbia
Country  Canada
Extent Princeton Basin
Type section
Named for Allenby, British Columbia
Named by Shaw
Year defined 1952

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 but best known from the Princeton Chert.

Fossil content

The following fossil genera and species have been described from the Allenby Formation:

Conifers, ferns, and ginkgos

Name Authority Year Family Notes Images

Abies milleri

Shorn & Wehr, 1986

2013

Pinaceae

Oldest true fir described

Abies milleri SR 87-52-02 A

Azolla primaeva

Arnold, 1955

1955

Salviniaceae

A mosquito fern

Azolla primaeva 6-7-19 img1 cropped

Ginkgo biloba

Linnaeus

2002

Ginkgoaceae

A ginkgo

Ginkgo biloba 01 SR 87-36-02 A

Ginkgo dissecta

Mustoe, 2002

2002

Ginkgoaceae

A ginkgo

Ginkgo dissecta SR 96-08-01

Metasequoia occidentalis

(Newberry) Chaney

1951

Cupressaceae

A dawn redwood

Metasequoia branchlet 02

Flowering plants

Name Authority Year Family Notes Images

Acer rousei

Wolfe & Tanai

1987

Sapindaceae

A maple

Acer stewarti

Wolfe & Tanai

1987

Sapindaceae

A maple

Acer stonebergae

Wolfe & Tanai

1987

Sapindaceae

A maple

Acer toradense

Wolfe & Tanai

1987

Sapindaceae

A maple

Alnus parvifolia

(Berry) Wolfe & Wehr

2013

Betulaceae

An Alder

Alnus parvifolia 03

Betula leopoldae

Wolfe & Wehr

1987

Betulaceae

A birch

Betula leopoldae SRIC SR02-22-19

Fagopsis undulata

(Knowlton) Wolfe & Wehr

2013

Fagaceae

A beech

Fagopsis undulata SRIC SR 08-33-07 img5a

Neviusia dunthornei

DeVore, Moore, Pigg, & Wehr

2004

Rosaceae

A snow wreath

Orontium wolfei

Bogner, Johnson, Kvaček & Upchurch

2007

Araceae

A golden-club

Orontium wolfei 02

Palaeocarpinus stonebergae

Pigg, Manchester, & Wehr

2003

Betulaceae

A betulaceous genus

Sassafras hesperia

Berry

2013

Lauraceae

A laural genus

Sassafras hesperia 01

Stonebergia

Wolfe & Wehr

1988

Rosaceae

A Sorbarieae genus

Tetracentron hopkinsii

Pigg et al

2007

Trochodendraceae

A Tetracentron relative

Tetracentron hopkinsii SR 02-28-07

Tsukada davidiifolia

Wolfe & Wehr

2013

Nyssaceae

A dove-tree relative

Tsukada davidiifolia 01b 09-21-20 A

Ulmus okanaganensis

Denk & Dillhoff

2007

Ulmus

An elm

Ulmus okanaganensis SR 92-04-06

Animals

Name Authority Year Family Notes Images

Aphrophora sp.

Scudder, 1895

1895

Aphrophoridae

A spittlebug

Bracon sp.

Scudder, 1879

1879

Braconidae

A braconid wasp

Cercopis grandescens

Scudder, 1895

1895

Cercopidae

A froghopper

Cercopites torpescens

Scudder, 1895

1895

Cercopidae

A froghopper

Coelidia columbiana

Scudder, 1879

1879

Cicadellidae

A leafhopper

Cryptocephalites punctatus

Scudder, 1895

1895

Chrysomelidae

A leaf beetle

Dawsonites veter

Scudder, 1895

1895

Cercopidae

A froghopper

Dinokanaga wilsoni

Archibald, 2005

2005

Dinopanorpidae

A scorpion fly

Elaterites sp.

Scudder, 1895

1895

Elateridae

A click beetle

Enchophora sp.

Scudder, 1895

1895

Fulgoridae

A fulgorid plant hopper

Eomerope simpkinsae

Archibald & Rasnitsyn, 2018

2018

Eomeropidae

A scorpionfly

Eriocampa tulameenensis

Rice, 1968

1968

Tenthredinidae

A sawfly

Libotonius blakeburnensis

Wilson, 1977

1977

Libotoniidae

A percopsiform fish

Limonius impunctus

Scudder, 1895

1895

Elateridae

a click beetle

Palaeoptysma venosa

Scudder, 1895

1895

Aphrophoridae

A spittlebug

Palaphrodes sp.

Scudder, 1895

1895

Aphrophoridae

A spittlebug

Palecphora sp.

Scudder, 1895

1895

Cercopidae

A froghopper

Planophlebia gigantea

Scudder, 1879

1879

Gerridae

A water strider

Plecia canadensis

Rice, 1959

1959

Bibionidae

A marchfly

Plecia pictipennis

Rice, 1959

1959

Bibionidae

A marchfly

Plecia pulchra

Rice, 1959

1959

Bibionidae

A marchfly

Plecia reducta

Rice, 1959

1959

Bibionidae

A marchfly

Plecia transitoria

Rice, 1959

1959

Bibionidae

A marchfly

Plecia similkameena

Scudder, 1879

1879

Bibionidae

A marchfly

Pseudosiobla campbelli

Rice, 1968

1968

Tenthredinidae

A sawfly

Ptysmaphora fletcheri

Scudder, 1895

1895

Aphrophoridae

Ricaniella antiquata

Scudder, 1895

1895

Polystoechotidae

Stenecphora punctulata

Scudder, 1895

1895

Cercopidae

Stenolocris venosa

Scudder, 1895

1895

Cercopidae

Trogosus latidens

Eberle, 2017

1935

Esthonychidae

A tillodontia species

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