The Roques de García are erosional remnants of the Cañadas series rocks. The Cañadas series of volcanic materials follow the Miocene basalts with an erosional unconformity and consist of a lower and upper Cañadas series of darker and lighter extrusive rocks and lavas, respectively. The type of erosion that has taken place here, tafoni (or cavernous) erosion, takes place where there are high temperature and humidity differences. It is a combination of physical and chemical weathering processes, and starts when water brings dissolved minerals to the rock surface. When the water dries, the minerals form crystals that force small particles to flake off the rock. Eventually, large cavities such as these form, having a cavernous and honeycombed shape because the surface layer of rock is harder than the interior. Ca adas Eventually Garc a It Miocene Roques The When basalts brings caldera canadas canary cavernous cavities changes chemical combination consist crystals darker de differences dissolved dries erosion erosional extrusive flake follow force form garcia harder high honeycombed humidity interior islands lavas layer lighter lower materials minerals particles physical place processes remnants respectively rock rocks roques series shape spain starts such surface tafoni taken takes temperature tenerife type unconformity upper volcanic water weathering
