Roques de Garcia are a group of rock formations (pinnacles) in the Las Cañadas caldera. This caldera is a large depression (16 km) that surrounds the highest peak of Tenerife (El Teide or Mount Teide) that rises 3718 meters above the sea level. The caldera floor itself is about 2000…2300 meters above sea level.
The caldera of the Las Cañadas formed 200,000 years ago as a result of the collapse of the volcano with the same name1. The collapse was probably multi-staged and was not typical vertical collapse which is how calderas usually form. The caldera of the Las Cañadas is a result of a lateral flank collapse. Evidence of it lies on the seafloor north of Tenerife as an extensive debris avalanche deposit2. Hence, the caldera has no northern rim. The Las Cañadas caldera is one of the two calderas after which all other calderas are named. The other being in La Palma (Caldera de Taburiente). The term “caldera” was first used in geological sense by a German geologist Christian Leopold von Buch who visited the Canaries in 1815.
The focus of this post are the pinnacles at the foot of the Mount Teide which exhibit weird shapes and are therefore one of the most important tourist attractions of the island. I recommend to arrive early in the morning because later you will have difficulties to find a parking place. I knew that and therefore arrived early and enjoyed the landscape without huge crowds. It is also good idea to arrive early because light conditions for photography are better. Light at noon is generally too harsh for landscape photography.
It must be said, though, that the vast majority of people only take a look of The Cinchado and its surroundings right next to the car park. But there is much more than that to those who are interested in geology. There is a very scenic hiking trail around the Roques. It should not take more than one hour to walk it through but I had so much to look at there that it took at least three times as much time for me. I am sharing some of the photos I took there with you below.
Tenerife has been restless after the collapse which is clearly manifested by the magnificent peak of El Teide which rises prominently about 1500 meters above the floor of the caldera. All of it had to form during the last 200,000 years. The volcano is active. Its last eruption took place a little more than 100 years ago (1909) but this timespan is nothing special to volcanoes. El Teide will undoubtedly erupt again in the future. The pinnacles of the Roques de Garcia are on the lower right.
1. Hoernle, Kaj & Carracedo, Juan-Carlos (2009). Canary Islands, Geology. In: Encyclopedia of Islands (Encyclopedias of the Natural World) (Ed. Gillespie, Rosemary G. & Clague, David A.). University of California Press. 133-143.
2. Schmincke, Hans-Ulrich (2005). Volcanism. Springer.
3. Gill, Robin & Thirlwall, Matthew (2012). Tenerife Canary Islands: Geologists’ Association Guide: No.49. The Geologists’ Association.