Davies, Neil S. and Gibling, Martin R. (2011) Evolution of fixed-channel alluvial plains in response to Carboniferous vegetation. Nature Geoscience, 4 (9). pp. 629-633. ISSN 1752-0894 EISSN:1752-0908 DOI https://doi.org/10.1038/ngeo1237
![]() |
PDF
Davies_and_Gibling_-_2011_-_Evolution_of_fixed-channel_alluvial_plains_in_resp.pdf Restricted to Registered users only Download (904kB) |
|
![]()
|
Image (JPEG)
ND_3_ngeo1237-f2.jpg Download (74kB) | Preview |
Abstract
The establishment of terrestrial plants during the Palaeozoic era was one of the most significant changes to the Earth system during the Phanerozoic eon. The continuing evolution and expansion of land plants irrevocably altered the alluvial landscape: the broad, unconfined and unconsolidated blankets of coarse sediment found at the start of the Cambrian period were replaced by a diverse array of braided and meandering channel styles and stable floodplains by the end of the Devonian period. Here we show that the first appearance of a sedimentary facies suite attributed to low-energy, organic-rich river systems with multiple channels and stable alluvial islands, known as anabranching or anastomosing rivers, occurred during the Carboniferous period. Our field studies and literature review demonstrate that the appearance of these rivers coincides with the continuing evolution of tree-like plants. We suggest that increased floodplain stability and new triggers for channel avulsion were provided by the increase in complexity and diversity of root assemblages, density of floodplain forests and production of woody debris associated with expansion of arborescence. We conclude that the expansion of tree habitats led to the crossing of a threshold in vegetative control of floodplain and river morphology during the Carboniferous.
Item Type: | Article |
---|---|
Uncontrolled Keywords: | NILAREP; IA65 |
Subjects: | 02 - Geodynamics, Geophysics and Tectonics |
Divisions: | 02 - Geodynamics, Geophysics and Tectonics |
Journal or Publication Title: | Nature Geoscience |
Volume: | 4 |
Page Range: | pp. 629-633 |
Identification Number: | https://doi.org/10.1038/ngeo1237 |
Depositing User: | Sarah Humbert |
Date Deposited: | 23 May 2013 14:30 |
Last Modified: | 07 Aug 2013 09:45 |
URI: | http://eprints.esc.cam.ac.uk/id/eprint/2779 |
Actions (login required)
![]() |
View Item |