Ordovician stratigraphy of Dobbin Bay, Radmore Harbour, and John Richardson Bay, east-central Ellesmere Island

Stratigraphic sections were measured and described at three localities on east-central Ellesmere Island, providing two, nearly continuous composite sections through more than 2 km of Ordovician strata. These successions conform to previously established formations from the Arctic Archipelago and northwest Greenland. All units are platformal in character: restricted-marine carbonates deposited above storm wave-base are the rocks of the Christian Elv Formation and of part of the Baumann Fiord, Eleanor River, and Bay Fiord formations; normal- marine, lagoonal carbonates are represented by the Cape Clay, Eleanor River, Thumb Mountain, Irene Bay, and Allen Bay formations, as well as parts of the Bay Fiord Formation. Peritidal deposits are present in parts of the Eleanor River and Bay Fiord formations. Lagoonal evaporites are present in the Baumann Fiord and Bay Fiord formations.