Final answer:
The Sangre de Cristo Mountains are the beginning of the Rocky Mountains, which stretch from New Mexico to Northern Canada.
Step-by-step explanation:
The Sangre de Cristo Mountains are the beginning of the Rocky Mountains. The Rocky Mountains stretch from New Mexico to Northern Canada and were formed during the Late Paleozoic. They are the result of an orogeny, or mountain-building event, that occurred during the Late Mesozoic and Early Cenozoic. The Rocky Mountains differ from the Himalayas as they were formed by low-angle subduction and have since been glaciated and eroded.