# Third-party notices

This app bundles the third-party work listed below. Every item is public domain or under a permissive Creative Commons / BSD-style licence.

| Component | Where | Licence |
| --- | --- | --- |
| Müller et al. 2022 plate model: finite rotations, valid times and the present-day static polygons (plate IDs and names) | `data/recon.json`, `data/land.json`, and the hub's `assets/data/restless-200.json` | [CC BY 4.0](https://creativecommons.org/licenses/by/4.0/). Dataset doi:[10.5281/zenodo.10910449](https://doi.org/10.5281/zenodo.10910449); paper doi:[10.5194/se-13-1127-2022](https://doi.org/10.5194/se-13-1127-2022) |
| Merdith et al. 2021 relative plate motions and static polygons, on which the Müller et al. 2022 model is built | as above | [CC BY 4.0](https://creativecommons.org/licenses/by/4.0/). Dataset doi:[10.5281/zenodo.13635864](https://doi.org/10.5281/zenodo.13635864); paper doi:[10.1016/j.earscirev.2020.103477](https://doi.org/10.1016/j.earscirev.2020.103477) |
| Natural Earth 1:110m coastlines, simplified | `data/recon.json` (Daylight Atlas's copy) | Public domain |
| Natural Earth 1:10m populated places, with IANA time zones | `data/cities.json`, Daylight Atlas's copy | Public domain |
| Go fonts (Regular, Italic, Smallcaps, Mono) by Bigelow & Holmes | the hub's `assets/fonts/`, WOFF2 subsets | BSD-3-Clause style (`../assets/fonts/LICENSE`) |

Nothing is loaded from a CDN, a font service or any other site, and the app makes no network requests beyond its own files. The GPlates Web Service and the GPlates plate-model repository are used only when rebuilding `data/recon.json`.

## Changes made to the plate model

The plate model is not redistributed in its original form. For this page:

- finite rotations were requested from the GPlates Web Service for every 10 million years from 0 to 250 Ma, stored as quaternions rounded to six decimals, and are interpolated in the browser;
- rotations are masked where the rotation tree says a plate did not exist at that time;
- the present-day static polygons were rasterised to a 0.5° grid of plate IDs, and each plate is labelled with the polygon name that covers most of it, except two plain-language labels (North China for plate 601, Somalia for plate 709);
- Natural Earth coastlines are carried with those rotations, and the land between them is filled on the same 0.5° grid.

The results are a simplified reconstruction for general interest, not the authors' published maps. Neither the authors nor EarthByte endorse this page.

## Müller et al. 2022

Müller, R. D., Flament, N., Cannon, J., Tetley, M. G., Williams, S. E., Cao, X., Bodur, Ö. F., Zahirovic, S., and Merdith, A.: A tectonic-rules based mantle reference frame since 1 billion years ago – implications for supercontinent cycles and plate–mantle system evolution, *Solid Earth*, 13, 1127–1159, https://doi.org/10.5194/se-13-1127-2022, 2022. Plate model on Zenodo: https://doi.org/10.5281/zenodo.10910449, licensed under CC BY 4.0.

## Merdith et al. 2021

Merdith, A. S., Williams, S. E., Collins, A. S., Tetley, M. G., Mulder, J. A., Blades, M. L., Young, A., Armistead, S. E., Cannon, J., Zahirovic, S., and Müller, R. D.: Extending full-plate tectonic models into deep time: Linking the Neoproterozoic and the Phanerozoic, *Earth-Science Reviews*, 214, 103477, https://doi.org/10.1016/j.earscirev.2020.103477, 2021. Plate model on Zenodo: https://doi.org/10.5281/zenodo.13635864, licensed under CC BY 4.0.

GPlates Web Service: https://gws.gplates.org/, by the EarthByte Group, University of Sydney.

## Natural Earth

Made with Natural Earth. Free vector and raster map data at [naturalearthdata.com](https://www.naturalearthdata.com/). Natural Earth data is in the public domain; no permission is needed to use it.