An Exhumed Late Paleozoic Canyon in the Rocky Mountains: A Reply
An Exhumed Late Paleozoic Canyon in the Rocky Mountains: A Reply
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落基山脉发掘的晚古生代峡谷：一个答复
DOI：
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发表时间：
2009
期刊：
影响因子：
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通讯作者：
Michael D. Blum
中科院分区：
文献类型：
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作者：
G. Soreghan;D. Sweet;Kristen R. Marra;C. Eble;M. Soreghan;R. Elmore;Sara A. Kaplan;Michael D. Blum
我们感谢 William Hood 对 Soreghan 等人的讨论。 （2007）。我们认识到，我们对导致乌纳威普峡谷形成的事件的解释，特别是我们提出的（祖先）峡谷的古生代年龄，代表着与既定模型的重大背离。验证我们关于其年龄和起源的假设将迫使对几个长期接受的模型进行修正，从该地区的新生代构造和地貌演化到该系统所代表的二叠纪-宾夕法尼亚热带地区的气候和构造框架。因此，我们的工作值得仔细审查，胡德的讨论提供了这样的机会。 Hood (2009) 在开始讨论时指出，Soreghan 等人。 （2007）提出了这样的假设：Unaweep 峡谷是一个二叠纪冰川山谷，被古生代沉积物填充，随后被新生代河流挖掘出来。为了澄清，Soreghan 等人的重点。 （2007）是假设的峡谷古生代年龄，尽管我们在文章的最后句子中提出了可能的冰川起源问题。然而，Soreghan 等人对冰川起源的证据进行了更完整的分析。 (2008)，尽管胡德提交讨论时只发表了这方面的摘要（例如，Soreghan et al. 2004）。尽管如此，我们在这里讨论胡德提出的所有观点；我们使用他提供的小标题来对待他的每一点。现场证据和古地磁数据的重新检验
We thank William Hood for his discussion of Soreghan et al. (2007). We recognize that our interpretation of the events leading to the formation of Unaweep Canyon, particularly our proposed Paleozoic age of the (ancestral) canyon, represents a significant departure from established models. Validation of our hypotheses regarding its age and origin would force revision of several longaccepted models, ranging from the Cenozoic tectonic and geomorphic evolution of this region to the climatic and perhaps tectonic framework of the Permo-Pennsylvanian tropics represented by this system. Accordingly, our work deserves close scrutiny, and Hood’s discussion provides such an opportunity. Hood (2009) begins his discussion by stating that Soreghan et al. (2007) presented the hypothesis that Unaweep Canyon is a Permian glacial valley that was filled by Paleozoic sediment and subsequently exhumed by Cenozoic rivers. To clarify, the focus of Soreghan et al. (2007) is the hypothesized Paleozoic age of the canyon, although we posed the question of a possible glacial origin in the final sentences of the article. A more complete analysis of the evidence for a glacial origin, however, appears in Soreghan et al. (2008), although only abstracts of this aspect (e.g., Soreghan et al. 2004) were published at the time that Hood submitted his discussion. Nevertheless, here we address all of the points raised by Hood; we treat each of his points using the subheadings he provides. Reexamination of the Field Evidence and Paleomagnetic Data