PALAEOZOIC PLATE POLYGON MODEL

By Mathew Domeier and Trond Torsvik (2014)

Visualization of the data requires the latest version of GPlates (www.gplates.org). Unzip all files to a common subdirectory. Six files contain the supplementary data:

1.  LP TPW.rot is a standard format Gplates rotation file for 410–250 Ma. The header (top 14 lines) includes our true polar wander (TPW) corrections.
2.  LP land.shp (and other extensions) is an ARC-GIS shapefile that contains select, present-day continent outlines (coastlines).
3.  LP ridge.gmpl, LP subduction.gpml, and LP transform.gpml are GPlates feature datafiles (in GPlates markup language format) containing our interpreted spreading ridge, subduction zone and transform plate boundaries, respectively.
4.  LP. topos.gpml is a GPlates feature datafile (in GPlates markup language format) containing the topological plate polygons built from the ridge, subduction and transform plate boundary polyline files.

At GPlates start-up, select all the unzipped files (‘File’ > ‘Open Feature Collection’). GPlates defaults to a mantle reference frame (plate ID = 0) and reconstructions will be displayed as TPW-corrected because of our header in the rotation file. To show reconstructions with respect to the spin-axis (i.e. a paleomagnetic reference frame) change the Anchored Plate ID to 1. (‘Reconstruction’ > ‘Specify Anchored Plate ID’). For further information on gplates and instructions on its use, visit www.gplates.org

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