21. Jurassic and Cretaceous clays are overlaid by Quaternary glacial deposits of chalky boulder clay. 22. The mystery started decades ago with some unusual glacial deposits . 23. Exposures of ancient glacial deposits are numerous in these areas. 24. As the water eroded away the glacial deposits , the level in the lake dropped. 25. The surrounding waters moderate the temperature, while glacial deposits provide good grape-growing soil conditions. 26. The rock is covered with glacial deposits over a large part of the territory. 27. The angular, coarse-grained, poor-sorted glacial deposit , called tillite, was deposited. 28. Unconsolidated glacial deposits along the riverbank at Broughton have caused several landslides along the riverbank. 29. Glacial deposits that take the shape of hills or mounds are called " kames ".30. Local wildlife preserved in glacial deposits include close relatives of modern clams, crustaceans, and snails.
