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MSIP Research Presentation Introduction Is there a relationship between the length and width of cracks? Are cracks located next to craters? We have noticed various cracks that are on top of craters, along edges of craters, and under craters. Different physical features such as length, width, and having little “cracks” coming out the side The longer the crack, the wider the secondary cracks. The shorter the crack, the smaller the secondary cracks. Background Definitions Fault A planar or gently curved fracture in the Earth's crust across which there has been relative displacement. ▪ http://www.geotech.org/survey/geotech/dictiona.html#sectF Crack A break without complete separation of parts Fissure ▪ http://dictionary.reference.com/browse/crack?s=t Faults can occur in any orientation and at any angle to horizontal (remember that this angle is known as the dip of the fault), but an active fault's orientation and dip are not necessarily random. Fault properties are influenced by the regional stress field created by tectonic activity. http://www.data.scec.org/Module/sec1pg21.html Crater Primary Crack Secondary Crack http://themis.asu.edu/zoom-20050225a Crater Primary Crack Secondary Crack http://themis.asu.edu/zoom-20030327a Experimental Design Used the THEMIS camera system from the Mars Odyssey Spacecraft Visible imagine system Used THEMIS website to select images of faults and cracks searching within a set location Used Targeting link to select a location on Mars to image http://themis.asu.edu Used the JMARS Program to explore the selected images Recorded Latitude & Longitude Record measurements Width of the crack At both ends At the center point At widest point At narrowest point Length of the crack Add any additional information of interest Such as closeness of a crater http://jmars.mars.asu.edu/downloads/jmars-msip.jnlp Analysis Plan Lat Long 38 219 32 244 26 138 25 24 Type of Crater Destroyed Length Center Narrow of Crack Width Width Widest Top/Left Bottom/Right Width End Width End Width 21.6 2.1 1.3 2.3 2.8 1.3 112.2 3.6 2.7 6.6 1.2 1.8 2.39 0.16 0.08 0.19 0.95 1.59 157 303 12.1 1.3 3.1 2.3 2.1 290 18.3 2.5 2.5 2.5 2.5 2.5 Preserved The Average Crack Width was calculated by averaging the following data items: Width at top/left end Width at bottom/right end Width at center Width at widest point Width at narrowest point 6 6 5 5 4 3 2 1 1 0 Preserved Modified Destroyed http://mola.gsfc.nasa.gov/images/mercat_med.jpg Conclusion Are cracks located next to craters? Investigated 46 cracks, only 12 were near a crater. About a fourth of the cracks that we investigated were near some type of crater. According to our collected data, not all cracks are located next to craters. Initial Research Question: Is there a relationship between the length & width of cracks? Hypothesis: The longer the crack, the wider the secondary cracks. The shorter the crack, the smaller the secondary cracks. Final Data Analysis: While the linear fit showed a positive slope supporting the hypothesis, the r value was low implying that there is insufficient evidence to show a direct correlation. Questions?