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The Late Ordovician (Sandbian) Glasford structure: A marine‐target impact crater with a possible connection to the Ordovician meteorite event

机译:晚奥陶涅师(Sandbian)Glasford结构:海洋目标影响火山口,可能与奥莫瓦迪艺术陨石事件有关

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Abstract > The Glasford structure in Illinois ( <fc>USA</fc> ) was recognized as a buried impact crater in the early 1960s but has never been reassessed in light of recent advances in planetary science. Here, we document shatter cones and previously unknown quartz microdeformation features that support an impact origin for the Glasford structure. We identify the 4?km wide structure as a complex buried impact crater and describe syn‐ and postimpact deposits from its annular trough. We have informally designated these deposits as the Kingston Mines unit ( <fc>KM</fc> ). The fossils and sedimentology of the <fc>KM</fc> indicate a marine depositional setting. The various intervals within the <fc>KM</fc> constitute a succession of breccia, carbonate, sandstone, and shale similar to marine sedimentary successions preserved in other craters. Graptolite specimens retrieved from the <fc>KM</fc> place the time of deposition at approximately 455?±?2?Ma (Late Ordovician, Sandbian). This age determination suggests a possible link between the Glasford impact and the Ordovician meteorite shower, an increase in the rate of terrestrial meteorite impacts attributed to the breakup of the L‐chondrite parent body in the main asteroid belt. </abstract> </span> <span class="z_kbtn z_kbtnclass hoverxs" style="display: none;">展开▼</span> </div> <div class="translation abstracttxt"> <span class="zhankaihshouqi fivelineshidden" id="abstract"> <span>机译:</span><Abstract Type =“Main”XML:ID =“Maps13401-Abs-0001”XML:Lang =“En”> <标题类型=“main”>抽象</ title> > 伊利诺伊州的格拉斯福德结构( <FC> USA </ FC> )在20世纪60年代初被公认为埋藏的冲击陨石坑,但从近期在行星科学的进步方面从未重新评估过。在这里,我们记录碎片锥体和先前未知的石英微道,支持Glasford结构的影响。我们将4个Km宽的结构识别为复杂的埋地撞击口,并从环形槽中描述了Syn-and Postimact沉积物。我们将这些存款非正式指定为金士顿矿山单位( <FC> KM </ FC> )。化石和沉积学 <FC> KM </ FC> 表示海洋沉积设置。各个间隔内 <FC> KM </ FC> 构成一系列Breccia,碳酸盐,砂岩和页岩,类似于在其他陨石坑中保存的海洋沉积演员。从中检索的格拉达岩标本 <FC> KM </ FC> 将沉积时间放置在大约455?±2?2?MA(旧奥陶语,桑太扬)。这个年龄决定表明格拉斯福德的影响与奥陶凡科陨石淋浴之间的可能联系,陆地陨石撞击率的增加归因于主要小行星带中的L-Chondrite母体的分解。 </ p> </摘要> </span> <span class="z_kbtn z_kbtnclass hoverxs" style="display: none;">展开▼</span> </div> </div> <div class="record"> <h2 class="all_title" id="enpatent33" > 著录项</h2> <ul> <li> <span class="lefttit">来源</span> <div style="width: 86%;vertical-align: text-top;display: inline-block;"> <a href='/journal-foreign-24922/'>《Meteoritics & planetary science 》</a> <b style="margin: 0 2px;">|</b><span>2019年第12期</span><b style="margin: 0 2px;">|</b> <span>共24页</span> </div> </li> <li> <div class="author"> <span class="lefttit">作者</span> <p id="fAuthorthree" class="threelineshidden zhankaihshouqi"> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Monson Charles C.&option=202" target="_blank" rel="nofollow">Monson Charles C.;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Sweet Dustin&option=202" target="_blank" rel="nofollow">Sweet Dustin;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Segvic Branimir&option=202" target="_blank" rel="nofollow">Segvic Branimir;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Zanoni Giovanni&option=202" target="_blank" rel="nofollow">Zanoni Giovanni;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Balling Kyle&option=202" target="_blank" rel="nofollow">Balling Kyle;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Wittmer Jacalyn M.&option=202" target="_blank" rel="nofollow">Wittmer Jacalyn M.;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Ganis G. Robert&option=202" target="_blank" rel="nofollow">Ganis G. Robert;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Cheng Guo&option=202" target="_blank" rel="nofollow">Cheng Guo;</a> </p> <span class="z_kbtnclass z_kbtnclassall hoverxs" id="zkzz" style="display: none;">展开▼</span> </div> </li> <li> <div style="display: flex;"> <span class="lefttit">作者单位</span> <div style="position: relative;margin-left: 3px;max-width: 639px;"> <div class="threelineshidden zhankaihshouqi" id="fOrgthree"> <p>Illinois State Geological SurveyUniversity of Illinois at Urbana‐Champaign615 East Peabody Drive Champaign Illinois 61820 USA;</p> <p>Department of GeosciencesTexas Tech University1200 Memorial Circle Lubbock Texas 79409 USA;</p> <p>Department of GeosciencesTexas Tech University1200 Memorial Circle Lubbock Texas 79409 USA;</p> <p>Department of GeosciencesTexas Tech University1200 Memorial Circle Lubbock Texas 79409 USA;</p> <p>Department of GeologyUniversity of Illinois at Urbana‐Champaign1301 West Green Street Urbana Illinois 61801 USA;</p> <p>Department of GeologyUniversity of Illinois at Urbana‐Champaign1301 West Green Street Urbana Illinois 61801 USA;</p> <p>Consulting Geologist749 Burlwood Drive Southern Pines North Carolina 28387 USA;</p> <p>Department of Earth and Environmental Sciences115 Trowbridge Hall Iowa City Iowa 52242 USA;</p> </div> <span class="z_kbtnclass z_kbtnclassall hoverxs" id="zhdw" style="display: none;">展开▼</span> </div> </div> </li> <li> <span class="lefttit">收录信息</span> <span style="width: 86%;vertical-align: text-top;display: inline-block;"></span> </li> <li> <span class="lefttit">原文格式</span> <span>PDF</span> </li> <li> <span class="lefttit">正文语种</span> <span>eng</span> </li> <li> <span class="lefttit">中图分类</span> <span> <a href="https://www.zhangqiaokeyan.com/clc/161.html" title="天文学">天文学 ;</a></span> </li> <li class="antistop"> <span class="lefttit">关键词</span> <p style="width: 86%;vertical-align: text-top;"> </p> </li> </ul> </div> </div> <div class="literature cardcommon"> <div 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