Most of our mountain ranges were formed near the time of what scientists call the KT boundary.
Mountain ranges affect weather patterns, rainfall, and temperatures.
Climates would have changed strongly, changing the environments and landscape. Tropical forests could change into dry deserts, and shallow seas could turn into snowy mountains. Around the world, temperatures would have become colder and more unpredictable each year. Many plants and animals, including dinosaurs, could not survive in this new climate. The KIE Group.