Connecticut-born and based artist Bryan Nash Gil works with nature and found objects to create sculptures, drawings, and prints. He has just published a book of his relief prints from cross sections of felled trees titled Woodcut.
From Princeton Architectural Press:
Gill reveals the sublime power locked inside their arboreal rings, patterns not only of great beauty, but also a year-by-year record of the life and times of the fallen or damaged logs. The artist rescues the wood from the property surrounding his studio and neighboring land, extracts and prepares blocks of various species—including ash, maple, oak, spruce, and willow—and then prints them by carefully following and pressing the contours of the rings until the intricate designs transfer from tree to paper.
These are so beautiful.