31 | Add to Reading ListSource URL: www.finderexp.comLanguage: English - Date: 2014-08-19 03:48:44
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32 | Add to Reading ListSource URL: www.colorado.eduLanguage: English - Date: 2015-04-09 11:47:56
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33 | Add to Reading ListSource URL: www.jmu.eduLanguage: English - Date: 2014-10-31 14:07:25
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34 | Add to Reading ListSource URL: www.stratigraphy.orgLanguage: English - Date: 2015-02-06 10:34:41
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35 | Add to Reading ListSource URL: pubs.usgs.govLanguage: English - Date: 2012-10-17 13:19:36
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36 | Add to Reading ListSource URL: www.beg.utexas.eduLanguage: English - Date: 2006-04-18 11:49:23
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37 | Add to Reading ListSource URL: www.kwo.orgLanguage: English - Date: 2011-07-07 12:56:41
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38 | Add to Reading ListSource URL: lawreview.vermontlaw.eduLanguage: English - Date: 2012-02-17 15:44:15
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39 | Add to Reading ListSource URL: rock.geosociety.orgLanguage: English - Date: 2010-04-21 15:59:31
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40 | Add to Reading ListSource URL: rock.geosociety.orgLanguage: English - Date: 2008-06-18 12:23:39
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