The Mount of Olives will split into a northern and a southern half creating a great valley. This will is to allow water to up well from within the Earth, flowing out to the east and west from the temple in Jerusalem.
The Mount of Olives
Dinosaur Classification
Whether or not a Biblical word translated as a kind of serpent refers to something which may have been a dinosaur is context dependent. Sometimes a snake is just a snake. Sometimes a serpent is a Sauropod.
November 5th
One third of all sea creatures are killed by an extraterrestrial impact, presumably because of the shock wave from it and an increase in temperature. Eventually the sea becomes so polluted that nothing can survive.