Isaac’s Harbour Drowned River
Isaac's Harbour is a small community in the Canadian province of Nova Scotia, located in Guysborough County. In 1861 gold was discovered in quartz veins on the Isaac's Harbour anticline to the east of the community in Goldboro. Goldboro is located on the eastern shore of the Fjord along Route 316.
Nova Scotia was affected by at least four ice advances from 75,000 to 10,000 years ago (called the Wisconsinan Glacial Stage). Glaciers usually follow the easiest route down a mountain, which is often an old river valley. Interlocking spurs created by a river are eroded at the ends by the glacier to create truncated spurs. When the glaciers retreat and along the coast it can result in a drowned river valley that remains open to the sea. Issac’s Harbour river exhibits these features for the last several kilometers of the river where it meets the ocean.
As glaciers receded and melted, sea levels rose and inundated low-lying river valleys creating a drowned river. In places where the sea level is rising relative to the land, sea water progressively penetrates into river valleys and the topography of the estuary remains similar to that of a river valley. Drowned river valleys are also known as coastal plain estuaries.
To log this Earthcache visit the viewing location. Please answer the following questions and send in a timely manner to my geocaching profile or email. Answers not received will result in deleted logs.
Questions:
1. How wide is the river at the head of the harbour? (bridge)
2. How wide is the river at ground zero?
3. How long is the salty inlet in kilometers?
4. Post a picture in your log with a personal item or hand in picture to prove you were there.
[REQUIRED] In accordance with the updated guidelines from Geocaching Headquarters published in June 2019, photos are now an acceptable logging requirement and WILL BE REQUIRED TO LOG THIS CACHE. Please provide a photo of yourself or a personal item in the picture to prove you visited the site.