https://ogma.newcastle.edu.au/vital/access/ /manager/Index ${session.getAttribute("locale")} 5 https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:22062 Wed 11 Apr 2018 16:19:35 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:31492 2 of 3-D seismic data and over 1000 well penetrations from the Cretaceous McMurray Formation in northeastern Alberta, Canada, provides a unique opportunity to characterize an ancient continentalscale river system. Paleochannels ranged from 475 to 1180 m wide and from 35 to 50 m deep, with meander-belt width-to-thickness ratios between 107:1 and 401:1. The data reveal evidence for intra-point-bar erosion and punctuated rotation, counter-point-bar development, and protracted channel cut-off and meander-loop abandonment. Observations enable interpretation of morphodynamic processes that are commonly observed in modern systems, yet rarely described from the rock record. A 3-D geocellular model and reconstructed paleochannel migration patterns reveal the evolutionary history of seventeen individual meander belt-elements, including point bars, counter-point bars, and their associated abandoned channel fills, which have been mapped using core, FMI logs, and seismic data. Results of the study show that intrapoint- bar erosion surfaces bound accretion packages characterized by unique accretion directions, internal stratigraphic architecture, and lithologic properties. We provide evidence for channel-belt-edge confinement and development of a counter-point bar, as well as the deposition of side bars and preservation of a mid-channel bar during meander-bend abandonment. Analysis of changes in meander-belt morphology over time reveal a decrease in channel-belt width/thickness ratio and sinuosity, which we compare with observations from the lower Mississippi River and attribute to the landward migration of the paleo-backwater limit due to transgression of the Cretaceous Boreal Sea into the Alberta foreland basin.]]> Wed 11 Apr 2018 16:16:30 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:26530 Wed 11 Apr 2018 14:00:43 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:15655 Wed 11 Apr 2018 13:31:27 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:6948 Wed 11 Apr 2018 11:12:15 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:21519 Wed 11 Apr 2018 10:02:20 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:6947 Wed 11 Apr 2018 09:47:17 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:14825 Wed 11 Apr 2018 09:17:44 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:27054 Tue 28 Mar 2017 14:55:52 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:54868 Tue 19 Mar 2024 14:47:58 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:22424 Thu 22 Sep 2016 11:02:40 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:31467 Sat 24 Mar 2018 08:43:49 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:2386 Sat 24 Mar 2018 08:29:32 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:2286 Sat 24 Mar 2018 08:26:59 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:19099 Sat 24 Mar 2018 08:05:15 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:16362 Sat 24 Mar 2018 08:04:57 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:18125 Sat 24 Mar 2018 08:04:47 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:19542 Sat 24 Mar 2018 07:58:27 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:17795 Sat 24 Mar 2018 07:57:38 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:17703 Sat 24 Mar 2018 07:57:31 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:16373 Sat 24 Mar 2018 07:52:27 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:6303 Sat 24 Mar 2018 07:49:02 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:6597 Sat 24 Mar 2018 07:46:22 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:30116 Sat 24 Mar 2018 07:37:56 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:25791 Sat 24 Mar 2018 07:34:46 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:25745 Sat 24 Mar 2018 07:30:54 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:25517 Sat 24 Mar 2018 07:26:01 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:27591 Sat 24 Mar 2018 07:23:41 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:23787 Sat 24 Mar 2018 07:16:25 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:23501 Sat 24 Mar 2018 07:13:03 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:23156 Sat 24 Mar 2018 07:10:34 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:51977 Mon 25 Sep 2023 11:26:51 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:32333 Mon 23 Sep 2019 13:40:38 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:25332 Mon 16 Apr 2018 14:32:26 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:17353 Mon 15 Jun 2015 14:22:10 AEST ]]>