From what I've seen in the log, it's the velociraptor from "JurassiCraft" that makes the whole game crash. I have two possible solutions atm:
1. Go to AppData\Roaming\.minecraft\config and select forge.cfg, then look for removeErroringEntities (it's line 59 in my case) and change it to true.
I RECCOMEND YOU DO A BACK-UP OF THE WORLD BEFORE LAUNCHING THE MINECRAFT - this option MIGHT cause some unwanted issues even tho it shouldn't.
2. If the first option doesn't work, you can download NBT Explorer and go to AppData\Roaming\.minecraft\saves\*world name*\playerdata and select the file with your UUID, open it with the app you've just downloaded and change your position in the file. I believe you'll find it in pos category.
I don't know any methods to remove only one, particular entity from the game. If the bug appears again, it may be a good move to completly delete the velociraptor specie from minecraft (there should be such option in jc's config).
I've seen this as well but I don't think so cuz the problem's clearly with jurassicraft. I mean, you can try removing the Optifine (I would even recommend doing it for testing purpouses), however, the log shows that this mod M A Y cause an error (probably it doesn't tho). That's why EnderIO's devs wrote to check the meaning of the word in a dictionary (which is in the attachments section).
That's exactly what I was about to suggest you, however, dinosaurs from newer versions of Fossils and archeology DO NOT spawn on normal vanilla biomes. You will need to use custom mob spawner or something like this (I don't know if there is such option in the mod's config).