Surprise! 'Tree Rings' Not Limited to Trees—Rocks Have Them Too

The Living Forest: What Tree Rings Tell us About the Life of a Tree - Arbor Day Blog

Tree Care: Winter Tree Protection

Glad You Asked: Igneous, Sedimentary, & Metamorphic Rocks - Utah Geological Survey, rocks

3 Main Types of Rocks and Their Properties, rocks

Tree Rings and Climate Center for Science Education

The Living Drill Bits That Grind Holes in Beach Rocks - Bay Nature, rocks

Primary Rocks: Types, Characteristics, and Significance, rocks

Tree rings provide snapshots of Earth's past climate – Climate Change: Vital Signs of the Planet

A tree ring record you weren't supposed to see - Climate Discussion Nexus

Evidence of ancient solar storms in tree rings could pinpoint major historical events, NOVA

Surprise! 'Tree Rings' Not Limited to Trees—Rocks Have Them Too

Primary Rocks: Types, Characteristics, and Significance, rocks

North Quabbin Forestry - A tree ring is a layer of wood produced during one tree's growing season. You can determine the age of the tree before it was cut by counting