The Day the Mesozoic Died

A massive crater came down and nailed the surface of Earth in Southern Mexico. It caused an insane amount of impact that sent debris in every direction, as well as massive tsunamis that sent 100 M high waves that covered half the land. The amount of ash that was sent into the atmosphere completely blocked off the sun and prevented any organism that relied on photosynthesis to flourish. And for organisms that didn't rely on photosynthesis, they were practically boiled under the heat of the crater. Discovering the crater was a different process though.  It took lots of research and searching, but once scientists discovered the KT boundary things began to piece together. They discovered that the KT boundary contained a rare element that was only found in astroids, so obviously an astroid had to have been there. They also examined that the texture of the layers above the KT boundary was different than the texture of the layers beneath the KT boundary. Scientists found that dinosaurs were only found beneath the KT boundary and above the KT boundary scientists were completely whipped out. They went and did more research down in Texas and discovered that mud from the bottom of the ocean was on land so it must've been underwater at one point in time. They continued to follow the information they gathered and they finally discovered a massive crater in the Ukantan Peninsula in Mexico that contained the same elements that was found in the debris that was found all over earth and in the KT boundary. Another thing that pieced it together was that half of the crater was in the water and half of it was on land so it would have sent waves all over Earth causing large tsunami's and dragging ocean mud onto present surfaces that ocean mud wouldn't be expected to be found.