干涉波在现在的自然水体环境中极其常见，但其遗迹则非常稀少。许多从事地质工作多年的人不认识也就不足怪。俗话讲，物以稀为贵，特别是多种沉积现象集中出现在很小的地区内，更是弥足珍贵。 以下为从网上搜到的干涉波痕实例，不加翻译，原文照登。每个实例的来源均明确标出。同时希望博友们能够提供更多的实例。 INTERFERENCE RIPPLES （定义） Interference ripples (a.k.a.“ladderback ripples”) are uncommon sedimentary structures . They consist of sediment surfaces showing two sets of ripple crests intersecting at high angles. They form as ripples get developed on an already-rippled sediment surface. They indicate the existence of two successive current directions. 来源： http://www.newark.osu.edu/facultystaff/personal/jstjohn/Documents/Cool-Rocks/Interference-ripples.htm ================================================================= Interference ripples on modern shallow-Water seafloor (western French Bay, southwesternSan Salvador Island, eastern Bahamas) . The sea-floor sediments are composed of biogenic aragonite (CaCO3). The prominent ridges are symmetrical ripple marks, formed by a dominant, shallow-water, two-directional current. The smaller, ladder-like ridges are symmetrical ripple marks formed by a subordinant, shallow-water, two-directional current. The two sets of ripple marks form an interesting network of sea floor ridges - interference ripples. ================================================================== Interference ripples in quartzose sandstone (Berea Sandstone, lower Kinderhookian Stage,lowermost Mississippian). The two successive current directions indicated bythe symmetrical ripples on this slab are left-to-right and up-and-down. The ripple set with ridges oriented up down formed by a dominant shallow-water, two-directional current moving perpendicular to the ridge crests(= left-and-right direction, when looking at this upright slab). OSU public display (Orton GeologyMuseum, Ohio State University, Columbus, Ohio, USA). ============================================================ 上面照片来源： http://digital.lib.uiowa.edu/cdm/singleitem/collection/geoscience/id/2793 ============================================================ These strange ripples in the Shepard formation are called interference ripple marks. They form when two currents go against each other at ~90°. Fieldnotebook for scale. 上面照片来自： http://blogs.agu.org/mountainbeltway/2010/08/23/rocks-of-glacier-national-park/ ========================================================== 照片来自： http://upload.wikimedia.org/wikipedia/commons/thumb/d/d1/Interference_waves_mark.jpg/800px-Interference_waves_mark.jpg ================================================================= 在百度文库中，找到一个中国人编写的有关干涉波痕的文件。 干涉波痕：在浅水地区，水流和波浪同时存在，在它们的联合作用下，可形成干涉波痕。 左侧的为 格子状 干涉波痕，右侧为 梯子状 干涉波痕。 上述照片出处： http://www.baidu.com/link?url=XEjyFBzfUgj6mjJxjSztGbpX0eOwn4vC5sUHSvh4ak9VGPQbeszIRmeWYa5IrJzu7fp4d02ZGUKuqhfmD7OMUJjNfw1cX8DW-byoQC-HLeC
标签: 干涉波痕
