Skip to Main Content
Book Chapter

Constraints on synrift intrabasinal horst development from alluvial fan and aeolian deposits (Triassic, Fundy Basin, Nova Scotia)

By
Sophie Leleu
Sophie Leleu
1
School of Geosciences, University of Aberdeen, Aberdeen AB24 3UE, UK
2
Present address: Bordeaux-INP, ENSEGID, EA4592 G&E, Université Bordeaux Montaigne, 1 allée Daguin, 33607 Pessac, France
Search for other works by this author on:
Adrian J. Hartley
Adrian J. Hartley
1
School of Geosciences, University of Aberdeen, Aberdeen AB24 3UE, UK
Search for other works by this author on:
Published:
January 01, 2018

Abstract

The Triassic Fundy rift basin in Nova Scotia is a large (>70 km wide) half-graben filled with alluvial, lacustrine and aeolian deposits. A major lithospheric lineament, the Cobequid–Chedabucto Fault Zone (CCFZ), which forms the tip of the Newfoundland–Gibraltar Fault Zone, occurs within the Fundy Basin. The timing of early movement on this important fault zone is poorly constrained. We present data from the alluvial and aeolian units that crop out adjacent to the CCFZ in the Minas sub-basin to determine the initiation of fault movement. We use the onset of alluvial fan deposition to infer when the fault became sufficiently active to create the intrabasinal topography and document the influence of fault activity on the intrabasinal drainage. The occurrence and preservation of aeolian deposits immediately adjacent to the CCFZ and concomitant with alluvial fan development suggests a wind shadow effect associated with the fault-generated topography. The onset of alluvial fan deposition associated directly with the fault occurred during Norian times, following an earlier phase of sedimentation in the Fundy Basin, and records a potentially important phase of plate reorganization during early Atlantic rifting.

You do not currently have access to this article.

Figures & Tables

Contents

Geological Society, London, Special Publications

Geology and Geomorphology of Alluvial and Fluvial Fans: Terrestrial and Planetary Perspectives

D. Ventra
D. Ventra
Utrecht University, the Netherlands
Search for other works by this author on:
L. E. Clarke
L. E. Clarke
University of Gloucestershire, UK
Search for other works by this author on:
Geological Society of London
Volume
440
ISBN electronic:
9781786203809
Publication date:
January 01, 2018

GeoRef

References

Related

Citing Books via

Close Modal
This Feature Is Available To Subscribers Only

Sign In or Create an Account

Close Modal
Close Modal