Fragments

"What appear to be fragments from the aftermath of massive impacts on Mars that occurred 4.5 billion years ago have been detected deep below the planet’s surface."https://www.jpl.nasa.gov/news/nasa-marsquake-data-reveals-lumpy-nature-of-red-planets-interior/?utm_source=iContact&utm_medium=email&utm_campaign=1-nasajpl&utm_content=insight20250828