Why is the period from 1528 to 1690 called the age of contact

There was a wave of exploration that began in 1492 with columbas' voyage which didn't take long to reach the land of texas. The sprains' conquest of the America began with the series of islands on the Caribbean Sea. The Newly formed colonial cities attracted exploration of the mainland.

Spanish explorers came through the route of sea to conquer or explore the American land. The new colonial system was quite attractive to them. This time period is known as Age of contact because of all the explorers coming for expedition.