<span>After Pennsylvania experienced its oil boom in the year
1859, there were three other states that discovered vast oil reserves. Two of
those states were Texas and California. Texas oil reserves helped in a major
way during this period for the economic growth of the United States. By the end
of the year 1940 Texas was considered one of the biggest oil producing state of
the United States. Some other states that joined in this oil boom were
Oklahoma, Illinois and Kansas. </span>
I'm interested in this question myself, I don't think Indians ever left physical structures behind, so I looked up a ton on geographical features left behind by Indians and not just in Northeastern and Southeastern America, because there are many types of Indians, but nothing came up on any type of Indian especially in the 1500's. I tried, but I don't think this question can be answered, I looked up this question in many different ways and broke it down to try and gather small pieces of information, but in the end there was no features known to be left behind by American Indians. If anything they left behind culture and methods of doing things. Hope anything I said helps even though I could not figure out the answer.
To help conceal the chaos in Catholic and Protestant churches
Fields of science, field of cemetery,drugs,
Remember, this is your own opinion. But 2 or 3 is probably a good answer.