ASIAN POLYGON MODEL

By Mathew Domeier (2018)

Visualization of the model requires the latest version of GPlates (www.gplates.org). The model is comprised by seven files:

1. EP-Asia_Rotation.rot is a standard GPlates format rotation file for 500-410 Ma. Lines 9 through 36 (all beginning with '001') are true polar wander (TPW) corrections.
2. EP-Asia_Land.gpml is a GPlates feature datafile containing select, present-day continent outlines (coastlines) as reconstructable polygons.
3. EP-Asia_Ridges.gpml is a GPlates feature datafile containing interpreted divergent plate boundaries as reconstructable polylines.
4. EP-Asia_Trenches.gpml is a GPlates feature datafile containing interpreted convergent plate boundaries as reconstructable polylines.
5. EP-Asia_Transforms.gpml is a GPlates feature datafile containing interpreted transform plate boundaries as reconstructable polylines.
6. EP-Asia_ArbitraryEdges.gpml is a GPlates feature datafile containing arbitrary polylines that are used to close the plate polygons once they reach the edge of the domain of interest of this model. Note: these features are geologically meaningless.
7. EP-Asia_Topologies is a GPlates feature datafile containing the topological plate polygons built from the ridge, trench and transform plate boundary polyline files plus the arbitrary (plate-closure) polylines.

At GPlates startup, select all the files ('File' > 'Open Feature Collection') and adjust the reconstruction time between 510 and 400 Ma (no features will appear outside this time-frame).

The rotation file defaults to a mantle reference frame (plate ID=000) and reconstructions will be displayed as TPW corrected. To show reconstructions with respect to the spin axis (i.e. the paleomagnetic reference frame), change the anchored plate ID to 1: ('Reconstruction' > 'Specify Anchored Plate ID'). To view only the reconstructed coastlines and plate topologies as shown in the figures of the main text, turn off the visibility of the polyline files in the layers menu.

For further information on GPlates and instructions on its use, visit www.gplates.org.

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