To log this earthcache, please don’t stress about answering the questions. Simply send your best attempts in a private message to me, (the cache owner), and then go ahead and log it as found.
You don’t need to wait for my approval. All attempts will be accepted.
Go ahead and have fun learning! 
Describe the sandstone at the first outcrop in terms of colour and texture from top to bottom.
- [REQUIRED] Please post a photo in your log of yourself or a personal item at the outcrop to prove you visited the site.
- What do you notice about the sediment here as opposed to earlier on the road? Is the sand finer or coarser?
- 25 meters further along the trail, what difference do you see in the gravel and sand?
- What process do you think caused the change in the rocks?
This earthcache will take you about 175 metres from the end of Outer Battery Road, down along the trail where the process of erosion is noticeably present. This is the focus of our earthcache.
Erosion is the process by which soil and rock particles are worn away and moved elsewhere by gravity, or by a moving transport agent – wind, water or ice. Erosion in a river is different from weathering because it involves the removal of solid material by a transporting agent. Transport is the processes by which the sediment is moved along a river-bed. River erosion is a very important part of water erosion. Rivers are natural channels that carry water from its source to lakes, other rivers, seas and so on. A water source is a geographic spot where moving water begins, such as a mountain top or a spring. The speed, behavior and erosive power of rivers are different at various stages of the river. What rivers do to the land also depends on the type of rock that the land is made of.
The St. John’s area was once in a basin. Rivers flowed southward across the region, depositing layer after layer of sediment eroded from an uplifted block in the north. Continued uplift provided a plentiful supply of sediment; over time and alluvial plain of river sediment formed as the basin filled in. An alluvial plain is a largely flat landform created by the deposition of sediment over a long period of time by one or more rivers coming from highland regions, from which alluvial soil forms.
As you walk further along the trail here, the sand is noticeably different from the others previously along the Outer Battery Road. There is coarser sediment here.
When a river reaches a lake or the sea the water slows down and loses the power to carry sediment further. The sediment is dropped at the mouth of the river. Some rivers drop so much sediment that waves and tides can't carry it all away. It builds up in layers forming a delta.
Here, we have a delta that is has undergone progradation. In geology, the term progradation refers to the growth of a river delta farther out into the sea over time.