аЯрЁБс>ўџ /1ўџџџ.џџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџьЅС‘a №ПќjbjbA]A] Є&+?+?тџџџџџџˆцццццццP8L X$Po$ˆˆ"ЊЊЊЊЊЊцшшшшшш,“RхpцЊЊЊЊЊЪццЊЊ)ЪЪЪЊцЊцЊцЪњ4."ццццЊцЪЪццЪ| JPrУКЪЪ?0oЪUЪUЪЪцPPФ PPPtyS 596 Impact Cratering Seminar Spring 2008 Instructor: H. J. Melosh—Kuiper Space Sciences 429 E Tel. 621-2806 Class Schedule: Tuesday and Thursday 2:00 to 3:15 pm, Space Sciences Room 308 Course Description: This is a one-semester, 3 unit graduate course that offers an in-depth description of the process of Impact Cratering and its application to the terrestrial planets and moons. Principal topics will be: Physics of the impact process, Geologic structure of individual craters, Statistics of cratered landscapes, Impact cratering and solar system evolution (origin of the planets, origin of the moon, early evolution of the Earth and planets), Impacts and Earth history (K/T impact, biologic extinctions), Impacts and the ejection meteorites from major planets. Course work will include a hands-on exercise in impact modeling using numerical methods. Text: Impact Cratering: A Geologic Process (available in PDF format). Lectures will be principally by the instructor, but occasionally local experts will be tapped for presentations. Regular reading in the text and adjunct materials will be assigned. Lecture Content: Jan 17: History of impact crater studies Jan 22: Prelude to impact: Stress waves in solids Jan 24: The beginning of impact: Contact and compression stage Jan 29: Expansion of the shock wave and impact metamorphism Jan 31: Formation of the excavation flow and opening of the crater Feb 5: Ejection and ejecta deposits Feb 7: Impact spallation: ejection of rocks from asteroids and planets Feb 12: Impact vapor plumes and chemical alteration of ejecta Feb 14: Scaling of crater dimensions Feb 19: Crater morphology: Simple craters Feb 21: Crater morphology: Complex craters Feb 26: Crater collapse and modification Feb 28: Giant impact craters: Rings and basins on silicate and icy bodies March 4: Modeling impact craters: Basics of numerical simulation March 6: Modeling impact craters: Impact crater hydrocodes, equations of state March 11: LPSC Houston: class rescheduled: The SALE hydrocode March 13: LPSC Houston, class rescheduled: Hands-on exercise in numerical modeling March 18: Spring Break, no class March 20: Spring Break, no class March 25: Cratered landscapes: Populations March 27: Cratered landscapes: Evolution of crater populations April 1: Regolith formation and evolution April 3: Impact/atmosphere interactions: Crater clusters, atmospheric erosion April 8: Impacts and the growth of planetesimals April 10: Origin of the Moon by giant impact: Early ideas April 15: Origin of the Moon by giant impact: Current thinking April 17: Late heavy bombardment, Moon and Earth April 22: Impacts the destroyer: Biological extinctions April 24: Impacts the creator: The origin of and spread of life April 29: Are asteroid impacts a serious hazard to civilization? May 1: The Big Three impact craters: Vredefort, Sudbury and Chicxulub May 6: Economic benefits from impact cratering Grading Policy: Grades are determined by class participation and a short (3-5 page) paper on a relevant topic of interest to the student. Class discussion and interruptions (within reason!) are encouraged. Grades are assigned on the S, P, C, D, E system. Attendance Policy: This is a seminar course, so attendance is optional. But remember that your grade will depend on participation, so please do not skip too many classes. Text: The text for this class is Melosh, “Impact Cratering: A Geologic Process”. Although this book is out of print and nearly impossible to obtain, I will provide a PDF copy to all class participants. Significant Dates: First Class: Thursday, January 17, 2:00 to 3:15 pm LPSC conference (most of us will be away), March 10-14 Spring Break, March 15-23 Last Class: Tuesday, May 6, 2:00 to 3:15 pm PAGE  PAGE 3  0>‡Цкg x y €  Ћ Ќ п р ›œЌ­ ВMNS-стущъыэюєѕіїјћќќѕќ№ќшќш№ќсќсќсќ№ѕ№ќѕќ№ѕќѕќ№збзбќзбзЦзбќ№hь$0JmHnHu hь$0Jjhь$0JU hЛ>Whь$hЛ>Whь$5 hь$5 hь$5CJhь$)  #$01hvwХЦклЏ А f g x y Ѓ Є и   V §§јјјіјјјяяяяіііяяяхлхххх ЦМd№ Ц8d№ ЦT$a$тћўўV ™ š О   E j k – Т У ь 7 8 z Ъ Ы \]~Ÿ Ы  6…ѕѕѕѕѕѕѕѕѕѕѕѕѕѕѕѕѕѕѕѕѕѕѕѕѕѕѕѕ Ц8d№…†Зђѓ3de ст#jkš›Ќ­lmžŸ ГДMNTUѕѕѕѕѕѕѕѕѕѕѕѕѕѕѕѕѕѕѕѕѕѕѕѕѕѕѕѕ Ц8d№U./cšДстыьэјљњћќѕѕѕѕѕѕѕѕѕцурцуррѕ1$1$$„С*„б„@&#$1$a$ Ц8d№&00PАа/ Ар=!А"А# $ %А|HHк(џсџтљFG(ќHHи(d'§`PRNTЅP@ёџP Normal$dha$CJOJQJkH'mH sH tH DA@ђџЁD Default Paragraph FontZiѓџГZ  Table Normal :V і4ж l4жaі _H(kєџС(No List 4@ђ4 Header  ЦрР!.)@Ђ. Page Number4>@4 Title$a$5CJ$ќ&(& !џџ z™ џџ z™!џџ z™šœ ќ$ #$01hvwХЦклЏАfgxyЃЄиV™šОEjk–ТУь78zЪЫ \]~Ÿ Ы 6 … † З ђ ѓ 3 d e   с т # j k š › Ќ ­ l m ž Ÿ   Г Д M N T U ./cšДстэјљ§˜0€€p`֘0€€p`֘0€€p`֘0€€p`֘0€€p`֘0€€p`֘0€€p`֘0€€p`֘0€€p`֘0€€p`֘0€€p`֘0€€p`֘0€€p`֘0€€p`֘0€€p`֘0€€p`֘0€€p`֘0€€p`֘0€€p`֘0€€p`֘0€€p`֘0€€p`֘0€€p`֘0€€p`֘0€€p`֘0€€p`֘0€€p`֘0€€p`֘0€€p`֘0€€p`֘0€€p`֘0€€p`֘0€€p`֘0€€p`֘0€€p`֘0€€p`֘0€€p`֘0€€p`֘0€€p`֘0€€p`֘0€€p`֘0€€p`֘0€€p`֘0€€p`֘0€€p`֘0€€p`֘0€€p`֘0€€p`֘0€€p`֘0€€p`֘0€€p`֘0€€p`֘0€€p`֘0€€p`֘0€€p`֘0€€p`֘0€€p`֘0€€p`֘0€€p`֘0€€p`֘0€€p`֘0€€p`֘0€€p`֘0€€p`֘0€€p`֘0€€p`֘0€€p`֘0€€p`֘0€€p`֘0€€p`֘0€€p`֘0€€p`֘0€€p`֘0€€p`֘0€€p`֘0€€p`֘0€€p`֘0€€p`֘0€€p`֘0€€p`֘0€€p`֘0€€p`֘0€€p`֘0€€p`֘0€€p`֘0€€p`֘0€€p`֘0€€p`֘0€€p`֘0€€p`ЦџџџџџПХ˜0€€qР˘0€€p0Цš€€Ыxџ ќ V …Uќћ !•!џ•€т§т§M с§џ@€L L №zдЭЭL L ;ќp @џџUnknownџџџџџџџџџџџџGTimes New Roman5€Symbol3 Arial9MNew York3Times"С €ѕаœЛ&єлЛFtf67ђƒД€ѕ;„ЅРДД€~4d‡ы@€ѕ;„п№џџџџџџџџџџџџџџџџџџџџџџЛ>Wџџ PtyS 505bMichael J. Drake jay meloshўџ р…ŸђљOhЋ‘+'Гй0€˜ЌИдр№  0 < H T`hpx' PtyS 505bMichael J. DrakeNormal jay melosh22Microsoft Word 11.3.8@Ф0‹@vЦеђкУ@№ex+Ш@ЈŒH1Ш7ђўџ еЭеœ.“—+,љЎ0 hp˜ Ј АИРШ а ц'lunar and planetary lab‡  PtyS 505b Title ўџџџўџџџ !"#$%ўџџџ'()*+,-ўџџџ§џџџ0ўџџџўџџџўџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџRoot Entryџџџџџџџџ РFщП” 1Ш2€1TableџџџџџџџџUWordDocumentџџџџџџџџЄ&SummaryInformation(џџџџDocumentSummaryInformation8џџџџџџџџџџџџ&CompObjџџџџџџџџџџџџXџџџџџџџџџџџџџџџџџџџџџџџџўџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџўџџџџџ РFMicrosoft Word DocumentўџџџNB6WWord.Document.8