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.

This activity is promoted by Stefan Rosendahl.

• Schedule: Monday 5th of October 2026 from 02:00 pm until 05:00 pm
• Theme(s): Archeology, History and Geology
• Type(s): Field trip
• Location: Outdoor activity
  

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

• Walking distance: 4.50
• 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:
  Mareta Beach
  37.005511,-8.940079

  Mareta Beach, in front of Raposo Restaurant.