Mathematics – Logic
Scientific paper
Dec 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002agufm.p71b0464k&link_type=abstract
American Geophysical Union, Fall Meeting 2002, abstract #P71B-0464
Mathematics
Logic
5415 Erosion And Weathering, 5480 Volcanism (8450), 8450 Planetary Volcanism (5480)
Scientific paper
Ceraunius Tholus, one of the medium-sized volcanoes at the Tharsis plateau on Mars, shows several enigmatic features and thus it is a target of intensive imaging by MGS(Caplinger 2001). Plescia(2000), based on the Viking images, argues that the basic construct is a basaltic shield although the lava flows are not wel rcognized, and postdated coverage of pyroclastic materials by plinian eruption is suggested. This means transition of eruption style from effusive type to explosive one. Higuchi and Kurita(2002) recently analysed the surface slope distribution of this volcano by using MGS-MOLA data. They revealed that, 1)the slope distribution pattern is quite similar to that of the terrestrial scoria cone though the size is largely different, 2)the eastern flank preserves the original morphology while the western half exhibits a sign of secondary modification such as edifice collapse, and 3)the surface is smoother in the western flank at the length scales of several km to 100m than that in the eastern flank. We consider that this is a kind of giant scoria cone. In this report, coupled with this quantitative morphological study we discuss the eruption style of Ceraunius Tholus and its variation with time based on MOC high resolution images. We particularly focuss on the clear morphological difference between the western and the eastern flanks revealed by MOC images. The surface of the western flank is characterized by abundance of flute marks(scouring pattern) radiating from the central caldera. This scouring pattern is considered to be created by hydrodynamic erosion of suspended flow. This indicates ground-hugging intense flow events happened at the late stage of the volcanic activity, which seems to overflow from the lower part of the caldera rim. Several small craters are buried by this flow and they remained tear-drop type erosional left-overs in the downstream. The nature of this flow event is discussed based on these morphological features.
Higuchi Shigeto
Kurita Kazuyoshi
No associations
LandOfFree
On the late stage eruptive activities of Ceraunius Tholus, Mars estimated by MOLA and MOC images does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with On the late stage eruptive activities of Ceraunius Tholus, Mars estimated by MOLA and MOC images, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and On the late stage eruptive activities of Ceraunius Tholus, Mars estimated by MOLA and MOC images will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1892350