The pebble beach at Saints Rest extends for one kilometre between the mainland and the peninsula that is covered by Irving Nature Park near Saint John, New Brunswick, Canada. The gravel and sand of which it is composed are precariously held together by the roots of marram grass. The beach forms a barrier between the sea and the salt marshes and river valley beyond.
The shore is covered by an amazing variety of pebbles of different geological origins, exhibiting a wide range of natural colours and patterns. Many or most of the smooth pebbles are derived from igneous rocks like granite found in the deposits of glacial moraine that covers much of the surface area in the region – rocks that were plucked up some distance away when the massive ice sheets passed over the native bedrocks, and then were eventually released in the thick superficial layers of sediment as the ice sheets melted.
Some of the other pebbles on the beach must have originated from local bedrocks that lie beneath the loosely compacted glacial moraine deposits covering the river valley, Irving Nature Park and Sheldon Point. The solid bedrock here belongs to the Taylor Island Formation, composed of Precambrian volcanic rocks (ZCTIvs). This underlying solid geology is visible in outcrops around the coastline of the nature park as well as on the headlands to the east and the west of Saints Rest Beach.
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