Deemed one of the most beautiful natural attractions in Canada, the Oak Ridges Moraine has for a long time provided many benefits to the residents of the Greater Ontario Area. The beauty of the Oak Ridges Moraine is like none other, it is for this reason that many people wonder, what it is that led to such a beautiful attraction. In order to get an answer to this question, first, you need to know the geology of the land that houses the moraine and the geology of the moraine itself.
Greater Ontario Area Geology
The regional terrain in the Greater Ontario Area is marked sharply by the shale’s, sandstones and limestone’s of Ordovician age to the south and the Precambrian Shield to the north. The Ordovician age terrain to the south is where you find the streams close to Lake Ontario, Lake Simcoe and the Niagara Escarpment. The Precambrian Shield to the north is where you find the Great Lakes and St Lawrence Lowlands.
Oak Ridges Moraine Geology
Oak Ridges Moraine is not limited to one terrain, it cuts across the two major terrains of the Greater Ontario Area, that is, the Ordovician age and the Precambrian Shield. Due to this, you will realize that there are distinct differences from one area to the other along the 160 km long moraine. In general, Oak Ridges Moraine consists of four major wedges of stratified sediment. These sediments form gaps, narrow beads, kettles, hummocks and plains. The lower Oak Ridges Moraine contact has rhythmically interbedded fine sands. This is in stark contrast with the higher Oak Ridges Moraine which has coarse gravels and sands.
Beneath the moraine lies the groundwater. The groundwater comes from rainwater percolation through the moraines’ porous sediments and debris. On some occasions, the groundwater resurfaces and it is this same water that flows into the many streams found in the Greater Ontario Area.