what happen in chapter 34?

They are all pretty frustrated about being carried us back to the shores they had left. Axel tries to calm and reason with his uncle. Axel really wants to abandon the mission. Still they return to the raft. They decide to explore the shoreline they had landed on. They pass a lot of granite mixed with flint, quartz, and alluvial deposits. They see a grave full of bones. They find "antediluvian monsters" which captivates uncle.

i want to know the  summary of journey to the centre of the earth : chapter 23 ,25 26 ,28,29, 30