Characteristics and Composition of Tillway Rock

The video tutorial takes place at the rock garden of Western University in London, Ontario, where a tillway rock is examined. This rock is composed of lithified glacial till, featuring a fine-grained matrix with various clasts, including felsic igneous and sedimentary types. The clasts are generally angular, indicating minimal weathering. The formation of tillite is explained as a result of glacial sediment compaction. The rock was later excavated and donated by Canada Building Materials.

Where is the rock garden located?

• University of British Columbia

• McGill University

• Western University in London, Ontario

• University of Toronto

What is the primary composition of the tillway rock?

• Metamorphic minerals

• Lithified glacial till

• Volcanic ash

• Sedimentary layers

Which type of clasts are found in the tillway rock?

• Only igneous

• Felsic igneous and sedimentary

• Metamorphic and volcanic

• Only sedimentary

How are the clasts in the tillway rock described?

• Perfectly rounded

• Irregular and jagged

• Flat and smooth

• Angular and not rounded

Who donated the rock to the rock garden?

• Ontario Geological Society

• Canada Building Materials

• Western University

• London Rock Collectors