🌍 CONTINENTAL DRIFT OVER THE LAST 1 BILLION YEARS Continental drift is the slow movement of continents caused by plate tectonics. Over the past 1 billion years, Earth’s landmasses have joined and separated several times, forming different supercontinents. 🔹 Rodinia (1.1 billion years –750 million years ago): All major continents joined near the equator. Later broke apart, leading to major climate changes. 🔹 Pannotia (600–540 million years ago): A short-lived supercontinent near the South Pole