Miocene vegetation in the Columbia River Basalt Province, Washington State, USA

Research output: Contribution to conferenceAbstract

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Abstract

The Columbia River Basalt Province (CRBP) provides excellent records of the effect of different types of volcanism on palaeo-vegetation dynamics. The CRBP is a Miocene-age continental Large Igneous Province (LIP) within the Columbia Basin in South Washington, North Oregon and West Idaho, USA. The province comprises a number of extensive basaltic lava flows, intercalated with sedimentary interbeds of fluvial, lacustrine and associated palaeosol environments. Based on sedimentary facies analysis the intra-basaltic drainage system development can be divided into an early, middle and late stage.
The early stage of CRBP evolution is characterised by high volcanic effusion rates and effusion volumes. Palynological data record vegetation, which is dominated by Taxodium, Alnus, Castanae, Tilia, Pterocarya, Carya, Platycarya, Ulmus, fresh water green algae (Schizosporis), fungi, ferns and fern allies (Filicopsida and Sphagnaceae).
The middle stage CRBP evolution marks the onset of waning LIP volcanism. The vegetation is characterised by mainly Nyssa, Taxodium, various mosses, ferns and fern allies, as well as increased fungal colonisations establishing in predominantly shallow lakes, swamps and wetland environments.
Late stage CRBP evolution is characterised by low eruption rates, and an increase in felsic ash delivery from the Cascade Range and the Yellowstone Hotspot. The vegetation is dominated by Alnus, Nyssa, Ilex, ferns (Osmunda), mosses (Sphagnaceae, Lycopodium), fresh-water green algae and fungal colonisations. Despite low effusion rates and effusion volumes associated with large fluvial and lacustrine environments (up to 45 m thick interbeds) establishing on the lava field, the vegetation record is relatively poor. The less-evolved flora diversity is inferred to relate to the up to 2 m thick ash fall out deposits, which covered wide areas of the lava field leading to a lack of nutrients supply, soil acidification and a vegetation regression.
Original languageEnglish
Publication statusPublished - 27 Mar 2013
EventVolcanism, Impacts and Mass Extinctions: Causes and Effects - The Natural History Museum, London, United Kingdom
Duration: 27 Mar 201329 Mar 2013

Conference

ConferenceVolcanism, Impacts and Mass Extinctions: Causes and Effects
CountryUnited Kingdom
CityLondon
Period27/03/1329/03/13

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fern
basalt
Miocene
vegetation
river
large igneous province
green alga
lava
moss
volcanism
ash
colonization
facies analysis
lacustrine environment
vegetation dynamics
paleosol
lava flow
swamp
province
hot spot

Cite this

Ebinghaus, A., Jolley, D. W., Hartley, A. J., Hole, M. J., & Millett, J. (2013). Miocene vegetation in the Columbia River Basalt Province, Washington State, USA. Abstract from Volcanism, Impacts and Mass Extinctions: Causes and Effects, London, United Kingdom.

Miocene vegetation in the Columbia River Basalt Province, Washington State, USA. / Ebinghaus, Alena; Jolley, David William; Hartley, Adrian John; Hole, Malcolm John; Millett, John.

2013. Abstract from Volcanism, Impacts and Mass Extinctions: Causes and Effects, London, United Kingdom.

Research output: Contribution to conferenceAbstract

Ebinghaus, A, Jolley, DW, Hartley, AJ, Hole, MJ & Millett, J 2013, 'Miocene vegetation in the Columbia River Basalt Province, Washington State, USA' Volcanism, Impacts and Mass Extinctions: Causes and Effects, London, United Kingdom, 27/03/13 - 29/03/13, .
Ebinghaus A, Jolley DW, Hartley AJ, Hole MJ, Millett J. Miocene vegetation in the Columbia River Basalt Province, Washington State, USA. 2013. Abstract from Volcanism, Impacts and Mass Extinctions: Causes and Effects, London, United Kingdom.
Ebinghaus, Alena ; Jolley, David William ; Hartley, Adrian John ; Hole, Malcolm John ; Millett, John. / Miocene vegetation in the Columbia River Basalt Province, Washington State, USA. Abstract from Volcanism, Impacts and Mass Extinctions: Causes and Effects, London, United Kingdom.
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N2 - The Columbia River Basalt Province (CRBP) provides excellent records of the effect of different types of volcanism on palaeo-vegetation dynamics. The CRBP is a Miocene-age continental Large Igneous Province (LIP) within the Columbia Basin in South Washington, North Oregon and West Idaho, USA. The province comprises a number of extensive basaltic lava flows, intercalated with sedimentary interbeds of fluvial, lacustrine and associated palaeosol environments. Based on sedimentary facies analysis the intra-basaltic drainage system development can be divided into an early, middle and late stage.The early stage of CRBP evolution is characterised by high volcanic effusion rates and effusion volumes. Palynological data record vegetation, which is dominated by Taxodium, Alnus, Castanae, Tilia, Pterocarya, Carya, Platycarya, Ulmus, fresh water green algae (Schizosporis), fungi, ferns and fern allies (Filicopsida and Sphagnaceae). The middle stage CRBP evolution marks the onset of waning LIP volcanism. The vegetation is characterised by mainly Nyssa, Taxodium, various mosses, ferns and fern allies, as well as increased fungal colonisations establishing in predominantly shallow lakes, swamps and wetland environments. Late stage CRBP evolution is characterised by low eruption rates, and an increase in felsic ash delivery from the Cascade Range and the Yellowstone Hotspot. The vegetation is dominated by Alnus, Nyssa, Ilex, ferns (Osmunda), mosses (Sphagnaceae, Lycopodium), fresh-water green algae and fungal colonisations. Despite low effusion rates and effusion volumes associated with large fluvial and lacustrine environments (up to 45 m thick interbeds) establishing on the lava field, the vegetation record is relatively poor. The less-evolved flora diversity is inferred to relate to the up to 2 m thick ash fall out deposits, which covered wide areas of the lava field leading to a lack of nutrients supply, soil acidification and a vegetation regression.

AB - The Columbia River Basalt Province (CRBP) provides excellent records of the effect of different types of volcanism on palaeo-vegetation dynamics. The CRBP is a Miocene-age continental Large Igneous Province (LIP) within the Columbia Basin in South Washington, North Oregon and West Idaho, USA. The province comprises a number of extensive basaltic lava flows, intercalated with sedimentary interbeds of fluvial, lacustrine and associated palaeosol environments. Based on sedimentary facies analysis the intra-basaltic drainage system development can be divided into an early, middle and late stage.The early stage of CRBP evolution is characterised by high volcanic effusion rates and effusion volumes. Palynological data record vegetation, which is dominated by Taxodium, Alnus, Castanae, Tilia, Pterocarya, Carya, Platycarya, Ulmus, fresh water green algae (Schizosporis), fungi, ferns and fern allies (Filicopsida and Sphagnaceae). The middle stage CRBP evolution marks the onset of waning LIP volcanism. The vegetation is characterised by mainly Nyssa, Taxodium, various mosses, ferns and fern allies, as well as increased fungal colonisations establishing in predominantly shallow lakes, swamps and wetland environments. Late stage CRBP evolution is characterised by low eruption rates, and an increase in felsic ash delivery from the Cascade Range and the Yellowstone Hotspot. The vegetation is dominated by Alnus, Nyssa, Ilex, ferns (Osmunda), mosses (Sphagnaceae, Lycopodium), fresh-water green algae and fungal colonisations. Despite low effusion rates and effusion volumes associated with large fluvial and lacustrine environments (up to 45 m thick interbeds) establishing on the lava field, the vegetation record is relatively poor. The less-evolved flora diversity is inferred to relate to the up to 2 m thick ash fall out deposits, which covered wide areas of the lava field leading to a lack of nutrients supply, soil acidification and a vegetation regression.

M3 - Abstract

ER -