South Fork and Heart Mountain Faults: Examples of Catastrophic, Gravity-Drive "Overthrusts," Northwest Wyoming, USA | The Institute for Creation Research
 
South Fork and Heart Mountain Faults: Examples of Catastrophic, Gravity-Drive "Overthrusts," Northwest Wyoming, USA

Download PDFDownload South Fork and Heart Mountain Faults: Examples of Catastrophic, Gravity-Drive "Overthrusts," Northwest Wyoming, USA PDF

In M. Horstemeyer, ed., 2013, Proceedings of the Seventh International Conference on Creationism, Pittsburgh, PA: Creation Science Fellowship. Visit the ICC at www.creationicc.org.

Abstract

Overthrust faults have been a source of debate and discussion in creation literature for many years. Their interpretation demands a better explanation in a Flood context. Two fault systems are examined as analogies for an “overthrust” model. The South Fork Fault System (SFFS) and the Heart Mountain Fault System (HMFS) exhibit folding and faulting consistent with thin-skinned overthrust systems. Both systems moved catastrophically under the influence of gravity. The South Fork Fault system (SFFS, southwest of Cody, Wyoming, exhibits tear faults, tight folds, a triangle zone, and flat-ramp geometries along the leading edge of the system. Transport was southeast, down a gentle slope during early to middle Eocene time (Late Flood), approximately coeval with the Heart Mountain Fault system (HMFS). The SFFS detaches in lower Jurassic strata, rich in gypsum-anhydrite, overlain by about 1250 m of Jurassic through Tertiary sedimentary and volcanic rocks. Movement between 5 km and 10 km to the southeast spread the allochthonous mass over an area exceeding 1400 km2. A break-away fault and an area of tectonic denudation mark the upper northwest part of the system. The exposed denuded surface was buried by additional Eocene-age volcanic rocks soon after slip. Catastrophic rear-loading during emplacement of HMFS may have initiated subsequent movement on the SFFS, with dehydration processes trapping water in a near frictionless anhydrite-water slurry. Rapid development of near-surface folds, as observed in the toe of the SFFS, could only have developed while the sediments were still unlithified.

Keywords

Break-away fault, denudation, detachment, gravity slide, gypsum dehydration, overthrust

For Full Text

Please see the Download PDF link above for the entire article.

The Latest
NEWS
Neanderthal Extinction Dilemma
How did Neanderthals go extinct? Four researchers from the Netherlands recently published the results of their computer-modeled human populations in the...

NEWS
More T. rex Soft Tissues
The latest fossil biochemistry paper, published in Scientific Reports, describes “blood vessel structures” recovered from inside a T. rex...

NEWS
Giving Tuesday 2019—Become a Creation Advocate
Today is Giving Tuesday—a global day of giving! This online event kicks off the charitable season, when many focus on their Christmas and...

NEWS
Inside December 2019 Acts & Facts
Do carbon ages refute the biblical timeline? How does homology confirm creation instead of evolution? Why is it important to know your Christian heritage?...

DAYS OF PRAISE DEVOTIONALS
Winter 2019
...