File:Sanilac Petroglyphs HSP park geology sign.jpg
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![File:Sanilac Petroglyphs HSP park geology sign.jpg](https://upload.wikimedia.org/wikipedia/commons/thumb/2/20/Sanilac_Petroglyphs_HSP_park_geology_sign.jpg/800px-Sanilac_Petroglyphs_HSP_park_geology_sign.jpg?20200513213544)
Size of this preview: 800 × 600 pixels. Other resolutions: 320 × 240 pixels | 640 × 480 pixels | 1,024 × 768 pixels | 1,280 × 960 pixels | 2,560 × 1,920 pixels | 3,264 × 2,448 pixels.
Original file (3,264 × 2,448 pixels, file size: 1.54 MB, MIME type: image/jpeg)