Open AccessSurficial geology, northeastern Cameron Hills, Northwest Territories, NTS 85-C/3, 4, 5, and 6
Author(s) -
I R Smith,
R C Paulen,
G W Hagedorn
Publication year - 2021
Language(s) - English
Resource type - Reports
DOI - 10.4095/328129
Subject(s) - geology , moraine , glacial period , bedrock , geomorphology , ice sheet , crevasse , alluvium , oceanography , paleontology
The northeastern Cameron Hills comprise a Cretaceous bedrock upland, rising >550 m above the regional boreal plains. It was inundated by the Laurentide Ice Sheet and includes much of a prominent 60 by 20 km southwest-oriented mega-scale glaciallineation field, formed in thick till. Subsequent ice flow on northeast Cameron Hills occurred north to south, and a series of lobate and ice-thrust moraines suggest glacial surging. Rotational bedrock slumps cover the eastern and northern flanks of Cameron Hills, and extensive alluvial fan depositsdraining from these slopes blanket the surrounding topography. The Cameron River formed as a glacial spillway, draining southwest across the upland before turning north and draining into Tathlina Lake. An expansive raised delta and glaciolacustrine sediment cover extending up to ~295 m abovesea level, south of Tathlina Lake, records impoundment of an ice-marginal lake between the northeastward-retreating Laurentide Ice Sheet and Cameron Hills.