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4_Acraman.html
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
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<html xmlns="http://www.w3.org/1999/xhtml">
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<meta http-equiv="content-type" content="text/html; charset=utf-8" />
<title>Impact Structures of the World
</title>
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<meta name="description" content="" />
<link href="default.css" rel="stylesheet" type="text/css" />
</head>
<body>
<div id="header">
<div id="logo">
<h1><a href="#">The Australian Impact Record</a></h1>
</div>
<div id="menu">
<ul>
<li class="active"><a href="index.html" title="">Homepage</a></li>
<li><a href="About.html" title="">About Me</a></li>
<li><a href="Astro.html" title="">Astronomy</a></li>
<li><a href="Diamonds.html" title="">Diamond Exploration</a></li>
<li><a href="Impacts.html" title="">Meteorites and Impacts</a></li>
<li><a href="Bibliography.html" title="">Bibliography</a></li>
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</div>
<br>
<div id="page">
<h2>Images of World Impact Craters</h2>
<h2>ACRAMAN IMPACT STRUCTURE - SOUTH AUSTRALIA</h2>
<br />
<img src="images/Impacts/AcramanLocation_500px.jpg" alt="xxxx"; width="500"; float: "center";>
<table border="1">
<tr>
<td width="200">Crater Name(s)</td>
<td>Acraman Impact Structure</td>
</tr>
<tr>
<td>Country</td>
<td>Australia</td>
</tr>
<tr>
<td>Longitude</td>
<td>135 deg 27 min E</td>
</tr>
<tr>
<td>Latitude</td>
<td>32 deg 01 min S</td>
</tr>
<tr>
<td>Diameter (km)</td>
<td>40 -90 km</td>
</tr>
<tr>
<td>Age</td>
<td>ca 580 Ma<td>
</tr>
<tr>
<td>Impact Origin Evidence</td>
<td>Shocked mineral grains, shatter cones, impact melt and distal ejecta</td>
</tr>
<tr>
<td>Description</td>
<td>The Acraman impact structure is a deeply eroded impact site with estimates of the depth of erosion to be about 2.5 km. The structure has a distinctive aeromagnetic signature and is expressed topographically as an approximately 30km diameter depression in the Gawler ranges of South Australia.</td>
</tr>
<tr>
<td>Landsat Scene</td>
<td>Path 100 Row 82</td>
</tr>
<tr>
<td>References</td>
<td style="text-align:left";>Haines P W. 2012. Impact Cratering and Distal Ejecta: The Australian Record. Australian Journal of Earth Science, 52, p. 481-507.<br>
Wallace M W, Gostin V A and Keays R R. 1996. Sedimentology of the Neoproterozic Acraman impact-ejecta horizon, South Australia. AGSO Journal of Geology & Geophysics, 16 (4), p. 443-451.<br>
Dyson I. 2005. Tsunamis and Super-Hurricanes after the Acraman Asteroid Impact. MESA Journal, 39, p.10-13.</td>
</tr>
<tr>
<td>Date Data Entered</td>
<td>2014 09 17</td>
</tr>
</table>
<img src="images/Impacts/Acraman8432_1000px.JPG" alt="xxxx";>
<p>Landsat 8 image of the Acraman Impact Structure (pansharpened RGB Bands 4, 3 and 2). Coordinates WGS84 UTM zone 53 South.</p>
<img src="images/Impacts/AcramanTMI_1000px.JPG" alt="xxxx";>
<p>Shaded Total Magnetic Intensity image of the Acraman Impact Structure (note circular de-magnetised zone). Coordinates WGS84 UTM zone 53 South..</p>
<img src="images/Impacts/Acraman1VD_1000px.JPG" alt="xxxx";>
<p>First Vertical Derviative Image of the Total Magnetic Intensity over the Acraman Impact Structure (note circular de-magnetised zone). Coordinates WGS84 UTM zone 53 South..</p>
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</body>
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