1. Department of Earth Sciences; Royal Holloway University of London; Egham; UK
2. Department of Geology; Southern Illinois University; Carbondale; Illinois; USA
3. Department of Geography; Royal Holloway University of London; Egham; UK
4. School of Earth Sciences and Environmental Sustainability; Northern Arizona University; Flagstaff; Arizona; USA
5. Centre for Ultrastructural Imaging; King's College London; London; UK
6. Museum of Paleontology and Department of Geological Sciences; University of Michigan; Ann Arbor; Michigan; USA
7. Swiss Light Source; Paul Scherrer Institut; Villigen; Switzerland