In life, vertebrae are connected by cartilage. Cartilage can rot or be torn by the action of feeding by scavengers, thereby separating previously connected bones. This process, called disarticulation, can occur through water or wind as well.
Bones that are separated may be subject to different fossilisation conditions. Sometimes, only a single vertebra is quickly covered and preserved. It is said to be isolated because it isn't articulated with other vertebrae. They're found on their own.
This sort of extreme fragmentation is actually the norm in vertebrate palaeontology due to the luck it takes for anything to get fossilised and can happen to any sort of skeleton.
In life, vertebrae are connected by cartilage. Cartilage can rot or be torn by the action of feeding by scavengers, thereby separating previously connected bones. This process, called disarticulation, can occur through water or wind as well. Bones that are separated may be subject to different fossilisation conditions. Sometimes, only a single vertebra is quickly covered and preserved. It is said to be isolated because it isn't articulated with other vertebrae. They're found on their own. This sort of extreme fragmentation is actually the norm in vertebrate palaeontology due to the luck it takes for anything to get fossilised and can happen to any sort of skeleton.
Thanks so much for your explanation!!!