Perseverance Finds Popcorn on Planet Mars

After months of driving, Perseverance has finally arrived at ‘Bright Angel’, discovering oddly textured rock unlike any the rover has seen before. The team now plans to drive up the slope to uncover the origin of this rock sequence and its relationship to the margin unit.

Having completed a survey of the intriguing and diverse boulders at 'Mount Washburn,’ the rover headed north, parking just in front of an exposure of layered light toned rock. This provided the team with our first close-up look of the rocks that make up the ‘Bright Angel’ exposure, so Perseverance stopped to acquire images, before driving west to a larger and more accessible outcrop where the rover will conduct detailed exploration.

Perseverance arrived at the base of this outcrop on sol 1175, and geologists on the science team were mesmerized by the strange textures of the light toned rocks found there. These rocks are filled with sharp ridges that resemble the mineral veins found at the base of the fan, but there appears to be more of them here. Additionally, some rocks are densely packed with small spheres, and we’ve jokingly referred to this as a ‘popcorn’-like texture. Together, these features suggest that groundwater flowed through these rocks after they were laid down. Next, Perseverance will gradually ascend up the rock exposure, taking measurements as it goes. Over the weekend, the abrasion tool will be used to take a close-up look and acquire detailed chemical information using the instruments on the rover’s arm. With this data in hand, the team will decide whether or not to sample. Once our exploration at ‘Bright Angel’ is complete, we will drive south back across Neretva Vallis and explore a site called ‘Serpentine Rapids’.

Written by Athanasios Klidaras, Ph.D. Student at Purdue University