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type="text/css"></style> <div id="ct" class="ct2 wp cl"> <div class="mn"> <div class="bm_haa cl"> <div class="bm_h cl"> <a href="http://www.oecr.com/portal.php?mod=rss&catid=58" class="y xi2 rss" target="_blank" title="RSS">订阅</a><h1 class="xs2">文章</h1> </div></div> <div class="kjkjb"> <div class="bm vw" style="margin-bottom:0;"> <div class="h hm"> <div class="zxtoux"><img src="http://www.oecr.com/uc_server/avatar.php?uid=54876&size=small" /></div> <h1 class="ph">44亿年前的地球已经拥有水 </h1> <p class="xg1"> 时间：2018-2-1 09:52<a class="zz" href="home.php?mod=space&uid=54876">作者：update</a> 阅读<em id="_viewnum">(597)</em> 评论: <a href="http://www.oecr.com/portal.php?mod=comment&id=6270&idtype=aid" title="查看全部评论"><em id="_commentnum">5</em></a></p> <div class="zxfb" ><a href="http://www.oecr.com/portal.php?mod=rss&catid=58" class="y xi2 rss" target="_blank" title="RSS">订阅</a></div> </div> <!--[diy=diysummarytop]--><div id="diysummarytop" class="area"></div><!--[/diy]--> <div class="s"> <div class="ss"><div><span>导读： </span>在海岸边的Hedlund港口以南的内陆地区，它们是皮尔巴拉克拉通地区的一部分，皮尔巴拉克拉通大约在35亿年前形成，当时地球还处于青年时期。</div> </div> <!--[diy=diysummarybottom]--><div id="diysummarybottom" class="area"></div><!--[/diy]--> <div class="d"> <!--[diy=diycontenttop]--><div id="diycontenttop" class="area"></div><!--[/diy]--> <table cellpadding="0" cellspacing="0" class="vwtb"><tr><td id="article_content"><div> 在海岸边的Hedlund港口以南的内陆地区，它们是皮尔巴拉克拉通地区的一部分，皮尔巴拉克拉通大约在35亿年前形成，当时地球还处于青年时期。仔细观察在这些山丘之一的一个煤层上，出现了一堆古老的橙色奶油状的岩石：一种称为Apex Chert的矿床。通过显微镜观察，有些看起来像描绘龙卷风的岩画，其他的类似扁平的蠕虫。</div><div><br></div><div> 通过对一块岩石中的微化石进行分析，威斯康星大学的地球化学家约翰·谷（John Valley）表示，它们的确是生物化石，它们的历史可以追溯到34.65亿年前。</div><div><br></div><div> 这块化石是迄今发现的最古老化石，也是目前地球上生命最早期的直接证据。这项最新研究报告发表在近期出版的《美国国家科学院院刊》上。</div><div><br></div><div> 而这又燃起了一个古代地球故事的浪潮。这则故事说道，在地球形成之后的五亿年里，地球都是地狱般热的。</div><div><br></div><div> 故事描述了早期世界被火山运动所摧毁，并且还会被其他行星碎屑轰击的恐怖环境，并称这个黑暗的地质时代直到三十八亿年前才结束，生命才得以发展。这个故事越来越火。</div><div><br></div><div> 但是现在现在许多地质学家认为地球从一开始就可能不温不火。因为科学家通过这块岩石发现，地球的地壳部分已经在44亿年前冷却和凝固了，换句话说地球满一亿岁的时候就已经非常冷静了。</div><div><br></div><div> 这些古老的岩石中的氧气表明这个星球早在43亿年前就有了水。而不是一次划时代的最后轰炸，陨石撞击可能会慢慢减弱，并且太阳系已经逐渐形成目前的状态。</div><div><br></div><div> 总而言之，来自古代地球和月球的最新证据描绘了一副非常不同的古代地球的画面：一个坚实，温和，清澈，充满水份的世界，是伊甸园一般的存在。</div><div><br></div><div><p style="text-align: center;"><a href="data/attachment/portal/201802/01/095222az7wo6hhphyoy6za.jpg" target="_blank"><img src="data/attachment/portal/201802/01/095222az7wo6hhphyoy6za.jpg"></a></p></div></td></tr></table> <!--[diy=diycontentbottom]--><div id="diycontentbottom" class="area"></div><!--[/diy]--> <script src="data/cache/home.js?eOg" type="text/javascript"></script> <div id="click_div"><table cellpadding="0" cellspacing="0" class="atd"> <tr><td> <a href="http://club.oecr.com/home.php?mod=spacecp&ac=click&op=add&clickid=1&idtype=aid&id=6270&hash=7140d02cb5468d47fe375a5024a39215&handlekey=clickhandle" id="click_aid_6270_1" onclick="showWindow(this.id, this.href);doane(event);"> 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<!--[diy=diycontentrelate]--><div id="diycontentrelate" class="area"></div><!--[/diy]--> <div id="comment" class="bm"> <div class="bm_h cl"> <a href="javascript:;" class="y xi2" onclick="location.href=location.href.replace(/(\#.*)/, '')+'#cform';$('message').focus();return false;">发表评论</a> <h3>最新评论</h3> </div> <div id="comment_ul" class="bm_c"> <p class="ptm pbm"><a href="http://www.oecr.com/portal.php?mod=comment&id=6270&idtype=aid" class="xi2">查看全部评论(<em id="_commentnum">5</em>)</a></p><form id="cform" name="cform" action="portal.php?mod=portalcp&ac=comment" method="post" autocomplete="off"> <div class="tedt"> <div class="area"> <textarea name="message" rows="3" class="pt" id="message" onkeydown="ctrlEnter(event, 'commentsubmit_btn');"></textarea> </div> </div> <div class="mtm"><span id="secqaa_qSak076Z"></span> <script type="text/javascript" reload="1">updatesecqaa('qSak076Z', '<sec> <span id="sec<hash>" onclick="showMenu(this.id);"><sec></span><div id="sec<hash>_menu" class="p_pop 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name="comment_anchor_15586"></a> <dl id="comment_15586_li" class="ptm pbm bbda cl"> <dt class="mbm"> <span class="y xw0 xi2"> <a href="javascript:;" onclick="portal_comment_requote(15586, '6270');">引用</a> </span> <a href="http://club.oecr.com/space-uid-81182.html" class="xi2 xw1" c="1">琨廷林</a> <span class="xg1 xw0">2018-2-2 05:17</span> </dt> <dd>前排，哇咔咔</dd> </dl><a name="comment_anchor_15582"></a> <dl id="comment_15582_li" class="ptm pbm bbda cl"> <dt class="mbm"> <span class="y xw0 xi2"> <a href="javascript:;" onclick="portal_comment_requote(15582, '6270');">引用</a> </span> <a href="http://club.oecr.com/space-uid-43200.html" class="xi2 xw1" c="1">zhangzhongwei69</a> <span class="xg1 xw0">2018-2-2 03:17</span> </dt> <dd>真tmd累，灌灌水放松下。</dd> </dl><a name="comment_anchor_15578"></a> <dl id="comment_15578_li" class="ptm pbm bbda cl"> <dt class="mbm"> <span class="y xw0 xi2"> <a href="javascript:;" onclick="portal_comment_requote(15578, '6270');">引用</a> </span> <a href="http://club.oecr.com/space-uid-136889.html" class="xi2 xw1" c="1">rstuv5738</a> <span class="xg1 xw0">2018-2-2 01:17</span> </dt> <dd>顶下，挺好的。</dd> </dl><a name="comment_anchor_15577"></a> <dl id="comment_15577_li" class="ptm pbm bbda cl"> <dt class="mbm"> <span class="y xw0 xi2"> <a href="javascript:;" onclick="portal_comment_requote(15577, '6270');">引用</a> </span> <a href="http://club.oecr.com/space-uid-21825.html" class="xi2 xw1" c="1">ryanshcn</a> <span class="xg1 xw0">2018-2-2 00:47</span> </dt> <dd>不错的内容。</dd> </dl><a name="comment_anchor_15563"></a> <dl id="comment_15563_li" class="ptm pbm bbda cl"> <dt class="mbm"> <span class="y xw0 xi2"> <a href="javascript:;" onclick="portal_comment_requote(15563, '6270');">引用</a> </span> <a href="http://club.oecr.com/space-uid-50273.html" class="xi2 xw1" c="1">jiangsir110</a> <span class="xg1 xw0">2018-2-1 18:17</span> </dt> <dd>我是学光学的啦。</dd> </dl></div> </div> <!--[diy=diycontentcomment]--><div id="diycontentcomment" 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