Supplemental material: Laurentian and Amazonian sediment sources to Neoproterozoic–lower Paleozoic Maryland Piedmont rocks

Geosphere, August 2015, v. 11, p. 1042-1061, doi:10.1130/GES01140.1, Supplemental Figure 1 - Photomicrographs of thin sections from each sample except 810001 from the Blockhouse Point Domain of the Mather Gorge Formation. Samples 211001 of the Loch Raven Formation and 909006 of the Araby Formation did not yield zircon. Thin sections were cut perpendicular to foliation and, when present, parallel to lineation. All images were acquired using transmitted, cross-polarized light. The scale is the same for all images. Mineral abbreviations: grt—garnet, hem—hematite, ms—muscovite, q—quartz. File size is ~42 MB.