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absentfalse.htm
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"
"http://www.w3.org/TR/REC-html40/loose.dtd">
<HTML>
<HEAD>
<META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=iso-8859-1">
<META NAME="Author" CONTENT="Paul R. Sheppard">
<META NAME="GENERATOR" CONTENT="Mozilla/4.05 [en] (Win95; U) [Netscape]">
<TITLE>Crossdating in Dendrochronology</TITLE>
<script src="RingAnomalies.js"></script>
<link href="RingAnomalies.css" rel=stylesheet>
<LINK REL=stylesheet HREF="crossdatestyle.css" TYPE="text/css">
</HEAD>
<BODY>
<H1>Skeleton Plotting Absent and False Rings</H1><BR>
<TABLE >
<TR><TD><!--<APPLET code="RingAnomalies.class" WIDTH=470 HEIGHT=330></APPLET>-->
<div id="appFrame" >
<input type="button" value="Try Again" onmousedown="appInit()" style="position:relative;top:10px">
<span id="answer" style="left:45; top:30"></span>
<canvas id="userGraph" height="91" width="421" style="left:15px; top: 50px" onmousedown="handleClick(event)"></canvas>
<canvas id="masterGraph" height = "181" width="451" style="left:15px; top:141"></canvas>
</div>
<script>
appInit();
</script>
</TD>
<TD>How to mark ring-growth anomalies on a skeleton plot:
<UL>
<LI>Missing Ring:
<UL>
<LI>Sample at left didn't have a ring for year 1905 of the chronology (index value of 0.0)
<LI>A dashed mark is drawn on the skeleton plot between the 19th and 20th lines
<LI><EM>Try This:</EM> Move skeleton plot one position to the right
</UL><BR>
<LI>False Ring
<UL>
<LI>Sample at right had a false ring for year 1925 of the chronology (index value of 2.0)
<LI>Diagonal marks are drawn on the skeleton plot on the 39th line
<LI><EM>Try This:</EM> Move skeleton plot one position to the left
</UL>
</UL>
<EM>Good idea:</EM> Hit the "Try again" button to see more examples</TD></TR></TABLE><BR>
<CENTER>
<TABLE>
<TR><TD>When <A HREF="SkeletonPlot18.htm">you try skeleton plotting for yourself</A>, you can turn on or off ring-growth anomalies:
<UL>
<LI>There will be square options for absent or false rings, as on the right
<UL>
<LI>Check one or both options to allow these growth anomalies
<LI>Un-Check the options to disallow these growth anomalies
<LI>Mouse click the "Restart" button
</UL>
<LI><EM>Important point #1</EM>: With options checked:
<UL>
<LI>Ring-growth anomalies are only <U>possible</U>, not for certain (just like in real life!)
<LI>Mouse click the "Hint" button to learn if your new core has ring-growth anomalies
<LI>Mouse click the "Hint" button again to hide the hint
</UL>
<LI><EM>Important point #2</EM>:
<UL>
<LI>When there are absent/false rings, include their dates when you <A HREF="findingdates.htm">find the dates</A>
</UL>
</UL></TD>
<TD><IMG SRC="anomalies.gif" WIDTH="88" HEIGHT="119" ALT="ring-growth anomaly options"></TD></TR></TABLE><BR>
<HR>
<A HREF="findingdates.htm">Previous Page</A> |
<A HREF="SkeletonPlot19.htm">Next Page</A><BR>
<A HREF="introcrossdate.htm">Introduction</A> |
<A HREF="applications.htm">Dendrochronology Applications</A> |
<A HREF="exampleapplication.htm">Crossdating Application</A> |
<A HREF="ringanomalies.htm">Ring-Growth Anomalies</A><BR>
<A HREF="sensitivitycomplacency.htm">Sensitivity-Complacency</A> |
<A HREF="plotting.htm">Skeleton Plotting</A> |
<A HREF="relativescale.htm">Relative Scale</A> |
<A HREF="masterchronology.htm">Master Chronology</A><BR>
<A HREF="patternmatching.htm">Pattern Matching</A> |
<A HREF="findingdates.htm">Finding the Dates</A> |
<A HREF="absentfalse.htm">Absent/False Rings</A> |
<A HREF="SkeletonPlot19.htm">Try Skeleton Plotting for Yourself!</A><BR>
<A HREF="http://www.ltrr.arizona.edu">Laboratory of Tree-Ring Research</A>
</CENTER>
<HR>
<ADDRESS>Paul R. Sheppard<BR>
Laboratory of Tree-Ring Research, The University of Arizona<BR>
Tucson, Arizona 85721 USA<BR>
office: (520) 621-6474, fax: (520) 621-8229<BR>
Comments to: <A HREF="mailto:[email protected]">[email protected]</A>
</ADDRESS><BR>
Copyright © 1998, Laboratory of Tree-Ring Research, The University of Arizona<BR>
Revised -- December, 1998<BR>
URL: <A HREF="absentfalse.htm">http://tree.ltrr.arizona.edu/skeletonplot/absentfalse.htm </A>
</BODY>
</HTML>