Deposition model to show two sample types at once

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How old are peats

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Jan 6, 2021, 7:28:53 AM1/6/21
to OxCal

Dear Christopher and all,

 

I am trying to build a deposition model using two P_sequences. For two layers of the investigated core, both humic and humin fractions were dated. I included sample depth (entered in meters) and want to colour each date based on sample type (humic/humin), so that I get a single depth-plot that shows the distribution of both sample types. I have created the script below, with a P_sequence for the humin samples and one for the humic samples.

 

Do you think this is right for what I am trying to achieve?

 

When I run the model, I receive the error “Resolving order: Finding R_Date 23376”, after which the outcome states “Warning! NULL distribution”. I can’t seem to fix it.

 

Your help would be highly appreciated.

 

Best wishes,

 

Cindy

 

 

-----

 

Plot()

 {

  P_Sequence("S17N",10)

  {

   Boundary("TopN");

   R_Date("23376",4410,26)

   {

    z=7.5;

    color="red";

   };

   R_Date("23797",4433,26)

   {

    z=7.49;

    color="red";

   };

   R_Date("23515",5019,26)

   {

    z=7.48;

    color="red";

   };

   R_Date("23516",6696,29)

   {

    z=7.305;

    color="red";

   };

   R_Date("23517",6407,29)

   {

    z=7.295;

    color="red";

   };

   Boundary("BottomN");

  };

  P_Sequence("S17C",10)

  {

   Boundary("TopC");

   R_Date("23830",4836,27)

   {

    z=7.48;

    color="blue";

   };

   R_Date("23831",6365,30)

   {

    z=7.305;

    color="blue";

   };

   Boundary("BottomC");

  };

 };

-----

Ray Kidd

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Jan 6, 2021, 9:06:24 AM1/6/21
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Hi Cindy,

As a starter, try putting the P sequence data in the oldest to youngest order.

Best wishes

Ray


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