Overview:
A naturally formed sea arch carved by wave action through the coastal bedrock — a classic coastal erosion feature on the Burnt Head Trail near Cupids. Learn how wave energy and rock structure shape this arch and answer a few short geology questions to log this EarthCache.
The Burnt Head sea arch is a coastal erosional feature formed where waves exploited weaknesses in the headland rock, enlarging sea caves until they met and formed an opening through the rock. This process — wave abrasion, hydraulic action, and the influence of fractures and bedding — is how many sea caves and arches form. Continued erosion will eventually collapse arches and leave behind isolated stacks.
The Burnt Head Sea Arch is a highlight of this coastal trail in Cupids and has been recognized as a heritage site. This EarthCache gives you the chance to observe an arch in its active stage of development and think about the forces shaping Newfoundland’s rugged coastline.
How to Get There:
- Start at the Burnt Head Trailhead (behind Cupid’s Cathedral House Bed & Breakfast /Anglican Cemetery).
- Follow the marked Burnt Head Trail along the coastal path (~2.7 km loop trail).
- The sea arch lies along the rocky shoreline near the posted coordinates.
Hints for your Visit:
- Use pacing, smartphone apps, or known-size objects to help estimate the span of the arch.
- Note the tide level when you visit — the appearance of the arch can change at high vs. low tide.
Safety Notes:
- Wear sturdy footwear and take care on uneven ground.
- Stay on marked trails and view the arch from a safe distance or vantage point.
- Be extremely cautious near cliffs and the water’s edge.
- Do not attempt to climb the arch or approach wet rocks at its base — waves and slippery rocks are dangerous.
- Watch children closely and keep pets on leash near cliffs.
EartCache Tasks /Logging Requirments:
To claim this EarthCache, please answer the following questions. Send your answers to the cache owner via Message Center or email before logging your find (do not post them in your log).
- Arch Width: From a safe viewing point, estimate the horizontal width (span) of the arch opening (in meters). Briefly describe how you estimated it.
- Rock Characteristics: Describe the rock in the area around the sea arch (is it layered or not). Do you think this rock is relatively resistant or weak to wave erosion?
- Evidence of Erosion: Describe two features near the arch that show ongoing coastal erosion (examples: notches, sea caves, fallen blocks, wave-cut platforms, etc.).
- Photo Proof: From a safe viewing point, take a photo of yourself or a personal item with the arch (maybe a foot, hand or even your HAT, it's up to you) and include this photo with your log entry.
Permissions & Stewardship:
- The Burnt Head Trail is maintained by the Cupids Trail Committee and this sea arch site is recognized as a heritage feature. Please respect this beautiful site - observe, learn, and leave only footprints!
References:
- Town of Cupids Trails Committee (Burnt Head Trail information)
- Newfoundland Geological Survey — Avalon Zone structural geology mapping
- Burnt Head Arch Municipal Heritage Site listing
- General coastal geomorphology and sea arch formation resources