get yourself a big chunk o' gypsum, and throw it off your roof...

Space/Science » in reply to re:.. must wake up though ... Yeah, the medium here is not calcium carbonate

get yourself a big chunk o' gypsum, and throw it off your roof...

jms — 10/11/2004 4:27:25 AM (archived)

...onto a hard surface. Now collect the pieces and describe the fracture pattern.

It will not be polygonal. It will radiate from the point of impact, modified by the pre-existing textural weakness of the rock and the angle at which the impact occured with respect to said weakness.

The whole thread (42 posts)

Stuff from the rovers - LJ - 10/7/2004 10:53:18 PM
- re: Stuff from the rovers - Raoul - 10/8/2004 7:33:21 AM
  - re Oppy pic: spectacular - aniel - 10/8/2004 8:38:34 PM
  - re: 2nd image is HUGE! - Marcia - 10/8/2004 12:15:21 PM
- re: Stuff from the rovers - Marcia - 10/7/2004 11:42:28 PM
  - Take a look at the APXS data for Ebenezer and Clovis. - Robert Clark - 10/8/2004 8:46:04 AM
    - re: Take a look at the APXS data for Ebenezer and Clovis. - Marcia - 10/9/2004 4:59:16 AM
      - re: Take a look at the APXS data for Ebenezer and Clovis. - Robert Clark - 10/13/2004 1:17:46 AM
      - Ebenezer and Clovis suggest volcanism - bruced - 10/9/2004 12:48:44 PM
        
        re: Ebenezer and Clovis suggest volcanism - Robert Clark - 10/13/2004 1:30:31 AM
        
        Indeed... - Nick Hoffman - 10/10/2004 1:08:58 AM
        
        re: Ebenezer and Clovis suggest volcanism - Robert Clark - 10/9/2004 7:20:04 PM
        
        re: Ebenezer and Clovis suggest volcanism - bruced - 10/10/2004 4:49:11 AM
        
        Greenhouses and Volcanism on Earth and Mars - Nick Hoffman - 10/10/2004 5:47:43 AM
        
        regular strata and the periodicity of cometary impact - E.P. Grondine - 10/10/2004 6:39:51 PM
        
        Impact history - Philip Simon - 10/11/2004 11:00:41 PM
        
        re: Impact history of Mars - E.P. Grondine - 10/12/2004 12:51:50 AM
        
        Partial agreement - Philip Simon - 10/15/2004 12:01:36 AM
  - Wopmay - jms - 10/8/2004 3:38:05 AM
    - re: Exquisitely argued - BRFelix - 10/9/2004 10:19:41 PM
    - The medium here is not calcium carbonate - E.P. Grondine - 10/9/2004 5:58:49 PM
      - Don't recall claiming it was CaCO3. - jms - 10/11/2004 4:15:28 AM
        
        "we start with what we know and work from there." - Nick Hoffman - 10/11/2004 12:38:06 PM
        
        reasoning by analogy - E.P. Grondine - 10/11/2004 3:42:26 PM
    - Curiouser and curiouser.... - Nick Hoffman - 10/9/2004 12:26:18 PM
      - re: Curiouser and curiouser.... - Marcia - 10/9/2004 2:27:30 PM
        
        re: ... must wake up though ... - Marcia - 10/9/2004 4:50:46 PM
        
        re:.. must wake up though ... Yeah, the medium here is not calcium carbonate - E.P. Grondine - 10/9/2004 5:23:12 PM
        
        get yourself a big chunk o' gypsum, and throw it off your roof... - jms - 10/11/2004 4:27:25 AM
        
        No one has said that the fracture pattern is not polygonal - E.P. Grondine - 10/11/2004 3:35:26 PM
        
        re: No one has said that the fracture pattern is not polygonal - Nathan Koren - 10/12/2004 3:35:46 AM
        
        So therefore the causative stresses were unlikely to be compressional... - jms - 10/12/2004 2:07:55 AM
        
        re: Acidic conditions/water and berries. - Marcia - 10/10/2004 7:33:46 PM
        
        re: Acidic conditions/water and berries. - E.P. Grondine - 10/11/2004 1:28:55 AM
        
        typo - E.P. Grondine - 10/9/2004 5:24:24 PM
    - re: Wopmay - Nick Hoffman - 10/8/2004 8:17:29 AM
      - Hydrothermal overtones - jms - 10/11/2004 3:48:52 AM
        
        re: The word: Thermophysical. - Marcia - 10/12/2004 5:06:57 AM
        
        Thermophysical vs hydrothermal - Nick Hoffman - 10/12/2004 8:54:50 AM
        
        re: Thermophysical vs hydrothermal - E.P. Grondine - 10/12/2004 9:28:22 PM
      - re: Wopmay - Marcia - 10/11/2004 1:25:43 AM
        
        Boiling gypsum mud. Wow. - jms - 10/11/2004 3:54:35 AM

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