Allenby Formation facts for kids

Kids Encyclopedia Facts

Quick facts for kids Allenby Formation Stratigraphic range: Ypresian 52.5–48Ma PreЄ Є O S D C P T J K Pg N ↓
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	Coal–breccia, coal–chert
Location
Coordinates	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
Images for kids

Fossil content

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

Conifers, ferns, and ginkgos

Name	Authority	Year	Family	Notes
Abies milleri	Shorn & Wehr, 1986	2013	Pinaceae	Oldest true fir described
Azolla primaeva	Arnold, 1955	1955	Salviniaceae	A mosquito fern
Ginkgo biloba	Linnaeus	2002	Ginkgoaceae	A ginkgo
Ginkgo dissecta	Mustoe, 2002	2002	Ginkgoaceae	A ginkgo
Metasequoia occidentalis	(Newberry) Chaney	1951	Cupressaceae	A dawn redwood

Flowering plants

Name	Authority	Year	Family	Notes
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
Betula leopoldae	Wolfe & Wehr	1987	Betulaceae	A birch
Fagopsis undulata	(Knowlton) Wolfe & Wehr	2013	Fagaceae	A beech
Neviusia dunthornei	DeVore, Moore, Pigg, & Wehr	2004	Rosaceae	A snow wreath
Orontium wolfei	Bogner, Johnson, Kvaček & Upchurch	2007	Araceae	A golden-club
Palaeocarpinus stonebergae	Pigg, Manchester, & Wehr	2003	Betulaceae	A betulaceous genus
Sassafras hesperia	Berry	2013	Lauraceae	A laural genus
Stonebergia	Wolfe & Wehr	1988	Rosaceae	A Sorbarieae genus
Tetracentron hopkinsii	Pigg et al	2007	Trochodendraceae	A Tetracentron relative
Tsukada davidiifolia	Wolfe & Wehr	2013	Nyssaceae	A dove-tree relative
Ulmus okanaganensis	Denk & Dillhoff	2007	Ulmus	An elm

Animals

Name	Authority	Year	Family	Notes
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

Images for kids

Sequoia affinis
Pinus latahensis
Pseudolarix wehrii
Rhus malloryi
Paleoallium billgenseli
Cercidiphyllum obtritum
Fothergilla malloryi
Comptonia columbiana
Macginitiea gracilis
Dipteronia brownii
Chaneya tenuis
Cryptocephalites punctatus (1895 illustration)
Galerucella picea (1890 illustration)
Cryptohypnus? terrestris (1890 illustration)
Elateridae sp. indet (1890 illustration)
Limonius impunctus (1895 illustration)
Tenebrio primigenius (1890 illustration)
Trox oustaleti (1890 illustration)
Penthetria (?) fryi
Penthetria whipsawensis
Plecia avus
Plecia canadensis
Plecia curtula
Plecia dilatata
Plecia elatior
Plecia minutula
Plecia nana
Plecia pictipennis
Plecia pulchra
Plecia pulla
Plecia reducta
Plecia similkameena
Plecia transitoria
Plecia tulameenensis
Microphor defunctus (1910 illustration)
Etoptychoptera tertiaria (1910 illustration)
Tipula tulameena
Aphrophora angusta (1910 illustration)
Palaeoptysma venosa (1895 illustration)
Ptysmaphora fletcheri (1895 illustration)
Cercopis grandescens (1895 illustration)
Cercopis selwyni (1890 illustration)
Cercopites torpescens (1895 illustration)
Dawsonites veter (1895 illustration)
Stenecphora punctulata (1895 illustration)
Stenolocris venosa (1895 illustration)
Coelidia columbiana (1890 illustration)
Telmatrechus stali (1890 illustration)
Planophlebia gigantea (1890 illustration)
Bracon sp. (1890 illustration)
Xorides lambei
Eriocampa tulameenensis
Ricaniella antiquata (1895 illustration)
"Amia" hesperia scale

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Allenby Formation Facts for Kids. Kiddle Encyclopedia.