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首页> 外文期刊>Earth Surface Processes and Landforms: The journal of the British Geomorphological Research Group >Cavernous weathering, dynamical instability and self-organization
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Cavernous weathering, dynamical instability and self-organization

机译：海绵状风化，动力不稳定和自组织

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摘要

Cavernous weathering may be conceptualized as a self-reinforcing process, characterized by positive feedback within the weathering system. A morphometric study of caverns in the Valley of Fire State Park, Nevada, USA, demonstrates the applicability of a dynamically unstable, or conditionally unstable, model of cavernous weathering systems. Outcrop surfaces displaying caverns tend to show increasing fragmentation of the surface in the early stages of cavernous weathering, succeeded by convergent evolution of the surface in which caverns tend to grow and coalesce. A paradoxical relationship exists between the weathering system output at the scale of individual forms and the outcrop scale: caverns tend toward minimum interior surface area by developing a spheroidal form, yet the outcrop surface tends toward maximum exposed surface area by increasing the degree of fragmentation of the surface.
机译：海绵状风化可以被概念化为一种自我增强的过程，其特征在于风化系统内的积极反馈。对美国内华达州火州立公园谷的洞穴进行形态计量学研究，证明了动态不稳定或有条件不稳定的洞穴状风化系统模型的适用性。在洞穴风化的早期，露头表面显示出洞穴的趋势倾向于显示出越来越多的碎片，这是由于洞穴趋于生长和聚结的表面趋于收敛而继之。各个形式的风化系统输出与露头的尺度之间存在矛盾的关系：洞穴通过形成球状而趋向于最小的内部表面积，而露头的表面由于增加了碎片的破碎程度而趋向于最大的暴露表面积。表面。

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