Structures built by organisms
Images copyright © 1998-2016, John W.F. Waldron, except where otherwise stated
Stromatolites, Table Head Group, W. Newfoundland
Stromatolites with silica replacement (pale), Durness Group, W. Scotland
Thrombolites, Ordovician St. George Group, W. Newfoundland
Patch reef in Middle Cambrian Port au Port Group, West Newfoundland
Patch reef in Middle Cambrian Port au Port Group, West Newfoundland