Ternyata mars memiliki topografi yg prosesnya dibentuk oleh proses yg berbeda dengan dibumi. Bahkan dianggap "incomparable with earth processes". Mungkin karena basic principle fisika lebih mengena di semesta ini makanya yg me-release AGU ... :) Kalau kita lihat dalam pendinginan baja dikenal juga istilah 'dendritic feature'. Jadi kalau melihat di mars ada 'dendritic feature' mesti hati2 interpretasinya. Bisa jadi akibat proses pendinginan magma.
RDP "ah bulan saja masih jauuh .... :( " ===== berikut adalah press relase AGU beberapa jam yg lalu ttg mars === PRESS RELEASE Date Released: Tuesday, September 14, 2004 Source: American Geophysical Union Drainage basins on Mars formed differently than on Earth Source: AGU A new comparison of drainage basins on Mars and Earth reveals fundamental differences in the ways that valleys were formed in the different environments. Stepinski and Coradetti observe that, unlike on Earth, where drainage flow typically conforms to the region's topographic features, drainage on Mars frequently appears to be independent of its surroundings. The authors used image analysis and data mining methods to quantify their observations and argue that the morphologies of Martian basins are incompatible with runoff from sustained, homogeneous rainfall. Instead, the researchers suggest that Martian valleys formed in a desert-like environment subjected to localized and intermittent fluvial activity, conditions somewhat similar to that found in Chile's Atacama Desert. They also report that a previous method using erosion diagnosis and surface elevation levels lacks the sensitivity to predict the origin of the runoff. Title: Comparing morphologies of drainage basins on Mars and Earth using integral-geometry and neural maps Authors: Thomas F. Stepinski, Lunar and Planetary Institute, Houston, Texas, USA; S. Caradetti, Massachusetts Institute of Technology, Cambridge, Massachusetts, USA. Source: Geophysical Research Letters (GL) paper 10.1029/2004GL020359, 2004 --------------------------------------------------------------------- To unsubscribe, send email to: [EMAIL PROTECTED] Visit IAGI Website: http://iagi.or.id IAGI-net Archive 1: http://www.mail-archive.com/iagi-net%40iagi.or.id/ IAGI-net Archive 2: http://groups.yahoo.com/group/iagi Komisi Sedimentologi (FOSI) : F. Hasan Sidi([EMAIL PROTECTED])-http://fosi.iagi.or.id Komisi SDM/Pendidikan : Edy Sunardi([EMAIL PROTECTED]) Komisi Karst : Hanang Samodra([EMAIL PROTECTED]) Komisi Sertifikasi : M. Suryowibowo([EMAIL PROTECTED]) Komisi OTODA : Ridwan Djamaluddin([EMAIL PROTECTED] atau [EMAIL PROTECTED]), Arif Zardi Dahlius([EMAIL PROTECTED]) Komisi Database Geologi : Aria A. Mulhadiono([EMAIL PROTECTED]) ---------------------------------------------------------------------
