Overview
A hypothetical colossal cliff system, theorized to have formed during the fragmentation of the ancient supercontinent Rodinia, has been proposed as a mechanism to explain a significant gap in North America's geological record, often referred to as the Grand Canyon's 'missing billion years.' This ancient landscape is posited to have exposed the core of the Grand Canyon nearly one billion years before the Colorado River's erosional activity carved the modern canyon.
Research Context
The geological phenomenon known as the 'Great Unconformity' represents a substantial chronological gap in the rock layers found within the Grand Canyon and across other parts of North America. This unconformity involves missing rock strata spanning approximately one billion years. The specific mechanisms and events responsible for this extensive erosion and subsequent non-deposition have been a subject of geological inquiry. The current proposition introduces a large-scale, ancient topographic feature as a potential explanation for this widespread absence of geological time.
Findings
The core finding proposes the existence of a mega-cliff system that developed during the rifting and breakup of the supercontinent Rodinia. This system, characterized by colossal cliffs, is implicated in processes that led to the exposure of the Grand Canyon's geological heart approximately one billion years ago. The formation of this ancient landscape is also suggested to correlate with the broader phenomenon of missing geological records across North America, addressing the Grand Canyon's 'missing billion years' by suggesting an extensive erosional event driven by large-scale tectonic activity.