More Scottish Geology

Around the time of "Snowball Earth," what is now Scotland was near the equator. As such, an outcropping of rocks from the Inner Hebrides may have the best surviving geological record of that period, after which animal life emerged.

Clues hidden in rocks about the freeze have been wiped out everywhere - except in the Garvellachs. Researchers hope the islands will tell us why Earth went into such an extreme icy state for so long and why it was necessary for complex life to emerge.

The relevant island is uninhabited except for researchers.