a review -- and awareness -- of the past may make us better geologists
in the future.
Framework of the Modern Mississippi Delta," by Fisk, McFarlan and
Kolb, Journal of Sedimentary Petrology, June 1954.
concept of a systematic arrangement of top set, foreset and bottom
set beds is shown to be invalid for large scale features such as
the Mississippi Delta.
" ... Sediments
of the river mouth region are arranged in leaf-like form, with the
deposits of the natural levees and associated channels forming the
veins and veinlets, and those of the marshes representing the inter-vein
portions of the leaf. Subsidence and shifting of the river channels,
combined with long-continued deposition, have created a 'pile of
leaves' structure beneath the extensive deltaic plain of the Mississippi."
an important and early paper that demonstrated the complex and variable
sediment patterns in a "bird foot" delta -- a delta where sediment
inflow is overpowering wave action on a shallow shelf.
Sidney Powers medalist, spent 40 more years at Shell's Bellaire
Research, powerfully expanding and amplifying this pioneering work
by Fisk, et al.