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A new window into Early Archean life: Microbial mats in Earth's oldest siliciclastic tidal deposits (3.2 Ga Moodies Group, South Africa)
Newly discovered sedimentary structures produced by ancient microbial mats in Early Archean sandstones of the 3.2 Ga Moodies Group, South Africa, differ fundamentally in appearance and genesis fromExpand
Quantifying the oldest tidal record: The 3.2 Ga Moodies Group, Barberton Greenstone Belt, South Africa
The 3.2 Ga Moodies Group in the Barberton Greenstone Belt, South Africa, contains the oldest preserved record of tides. The tidal record is preserved in a tidal sand-wave deposit in the lower MoodiesExpand
Muddy Roll-up Structures in Siliciclastic Interdune Beds of the c. 1.8 Ga Waterberg Group, South Africa
Abstract Concentrically rolled-up silty mudrock laminae, 1–2 mm thick, are found in the uppermost of four, 40–110 cm thick interdune beds within a thick aeolian succession of the c. 1.8 Ga MakgabengExpand
Sedimentology of the Unicoi Formation in southern and central Virginia: Evidence for late Proterozoic to Early Cambrian rift-to-passive margin transition
Few detailed-facies analyses of the rift-to-passive margin transition have been undertaken in exhumed orogenic belts. The Unicoi and lower Hampton Formations in the central and southern AppalachiansExpand
Controls on spatial and temporal distribution of Precambrian eolianites
Abstract Inversely graded stratification, generated by the migration of wind ripples, and adhesion structures permit unequivocal identification of Precambrian eolianites. These criteria, inExpand
Secular changes in sedimentation systems and sequence stratigraphy
Abstract The ephemeral nature of most sedimentation processes and the fragmentary character of the sedimentary record are of first-order importance. Despite a basic uniformity of external controls onExpand
Neoarchaean (c. 2.58 Ga) halite casts: implications for palaeoceanic chemistry
Possibly the most extensive and best-preserved Archaean halite casts yet discovered occur in the c. 2.58 Ga upper Black Reef and basal Oaktree formations, Transvaal Supergroup, in MpumalangaExpand
Redoximorphic Paleosols in Alluvial and Lacustrine Deposits, 1.8 Ga Lochness Formation, Mount Isa, Australia: Pedogenic Processes and Implications for Paleoclimate
ABSTRACT Paleosols in the Lochness Formation (1.8 Ga, Australia) include both rare, non-red and abundant, strongly reddened varieties that formed at subaerial exposure surfaces in bothExpand
The Geography of Things That May Become Memories: The 2001 Earthquake in Kachchh-Gujarat and the Politics of Rehabilitation in the Prememorial Era
Abstract This article explores the politics of reconstruction and the competing memorial practices that emerged after a devastating earthquake in western India during 2001. The material is drawn fromExpand
Early Cambrian age for synrift deposits of the Chilhowee Group of southwestern Virginia
A newly discovered shelly fossil (hyolithid?) and trace fossil ( Rusophycus ) were found within synrift and postrift sediments of the Chilhowee Group in southwestern Virginia. These specimensExpand