Geology: Mareta and Tonel Beaches

Mareta Beach is one of the most interesting geological sites in the Algarve. We can observe a fossil coral reef with an age of about 170 million years, fossil traces created by enigmatic animals, a vein with volcanic rock, rock structures derived from underwater landslides, and a fossil dune. The visit continues at Tonel beach, where you can see signs of movements of the Earth’s crust, such as folds and faults, and a layer full of stromatoporid fossils, a group that is attributed to the spongiums.

The activity includes a walking route of about 4.5 km, passing through sandy beach and roads with car circulation.

This activity is facilitated by Stefan Rosendahl.

• Schedule: Saturday 4th of October 2025 from 08:00 am until 11:00 am
• Theme(s): Archeology, History and Geology
• Type(s): Field trip
• Location: Outdoor activity
• Nr of participants: Mín. 2 Max. 20 (minimum age 6 years old)
• Language: Portuguese, English
• Target Audience: All audiences
• Registration: Activity with online registration
• Recommendations:

  Bring suitable footwear, water, sun protection and a snack.

• Partner:
  geoloquium

  
• Meeting point:
  Tonel Beach
  Lat: 37.00765181194641 / Lon: -8.947237439147944

  Platform at the entrance to Tonel Beach (lat. 37.0075; long. -8.9470)