Where lies the ancient impact crater;that is responsible for the dinosaur die off???

Answer 1

The folks who identified the Gulf of Mexico as the spot where the huge impact occurred are correct. The crater has been named Chicxulub, and it is huge--though it did not form the Gulf of Mexico--which existed before the meteor landed. Website below gives additional information about the location of the site, and links to information about its structure, where some of the ash from the explosion went, and so forth.
Second url links to geophysical survey showing bullseye gravity anomalies over proposed site.
There are some scientists who argue that the final,final bit of extinction of some index fossils that marks what scientists call the Cretaceous-Tertiary boundary (K-T boundary), actually occurred a little later than the big impact. The third website links you to some of that debate.

Answer 2

The center of the Chixulub crater is just north of Merida on the Yucatan Peninsula of Mexico. It is buried by several thousand feet of sediment. Whether of not the the impact was totally responsible for the end of Cretaceous extinction is still being debated. There may have been some other factors that contributed - such as the volcanic eruptions that formed the Deccan Plateau in India.

Answer 3

The round crater between Florida and Texas, which is essentialy the gulf of mexico

Answer 4

Some say it IS the Gulf of Mexico, but there was more than one reason. Some still list genetic senescence as a factor. Mammals were more able to adapt to rapidly changing climate.

Answer 5

North of the Yucatan peninsula of Mexico.

Answer 6

In the south west of the gulf of Mexico. All of it under water.