https://www.usa.gov/copyrighted-government-workshttps://www.rawpixel.com/image/4033891Edit ImageSaveSaveEditCropCustom TextOld growth soil crust covered in the lichen "brain scale."Credit: NPS/Neal Herbert. Original public domain image from FlickrMorePublic DomainFree CCO U.S. Government image for Personal and Business useInfoView CC0 LicenseJPEGBanner JPEG 1200 x 801 px | 300 dpiLarge JPEG 3246 x 2166 px | 300 dpiFree DownloadOld growth soil crust covered in the lichen "brain scale."More