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diff --git a/cookbooks/3d_cartesian_rift/doc/README.md b/cookbooks/3d_cartesian_rift/doc/README.md
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+(part:user_manual:chap:cookbooks:sec:3d_cartesian_rift)=
+3D Cartesian Rift
+======================
+
+A simple setup of a rift in a Cartesian box, in which two plates are spreading at a constant spreading rate.
+The files can be found [here](https://github.com/GeodynamicWorldBuilder/WorldBuilder/tree/main/cookbooks/3d_cartesian_rift).
+
+The relevant part of the World Builder file looks like this:
+
+:::{literalinclude} ../3d_cartesian_rift.wb
+:language: json
+:lineno-start: 1
+:::
+
+And the generated output model looks like this:
+
+:::{figure} 1000K_temperature_contour.png
+:name: 3D_cartesian_rift_temperature_contour
+:alt: 3D Cartesian Rift cookbook temperature contour. 
+:align: center
+
+The 1000 K temperature isosurface of the 3D Cartesian rift cookbook. Colors represent the depth of the isosurface in meters and the
+black box represents the boundaries of the model setup.
+:::
diff --git a/cookbooks/index.md b/cookbooks/index.md
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+(part:user_manual:chap:cookbooks:sec:index)=
+Cookbooks
+======================
+
+This section contains self-contained cookbooks on how to design different geodynamic setups. Cookbook folders contain World Builder parameter files, grid output files, and optionally a documentation folder called `doc`. The documentation folder contains markdown files and figures, which are incorporated into the online documentation and explain particular features about the cookbook.
+
+
+```{toctree}
+: hidden:
+
+3d_cartesian_rift/doc/README
+```
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+../../../cookbooks
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-(part:user_manual:chap:cookbooks:sec:index)=
-Cookbooks
-======================
-
-```{todo}
-This section contains self contained cookbooks on how to design different geodynamic setups.
-
-Examples of cookbooks could be how to setup a (more) realistic 2D or 3D subduction zone, how to use topography, how to use slab2 datasets, adding world fault databases, etc.
-```
-
-```{toctree}
-:hidden:
-
-```
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