I should say that I am enjoying the cruise with
@k_sheep and her +1 and two friends of theirs, and
@Flashback, his +1 and his parents. So a pack of 9, nearly all with a strong interest in gin & tonics. One cabin (not mine) became a regular 'gin palace'

Very good travelling companions
After re-boarding, we headed NW along the coast of Disko Island to a location called Kuanit and a destination I was really looking forward to. Some of the freakiest geology I've ever seen.
Although much of Greenland is abt 3 billion years old, there are regions of enormous amount lava and volcanic rock accumulations - abt 7km thick, millions of cubic km of volcanics. At Kuanit there is an area of basalt lava that has cooled to form columns, much like many other places in the world (Giant's causeway in Ireland, Devil's Tower in Wyoming, Organ pipes at Hobart). However here, they have columns in many directions by a mechanism I don't understand. From Google, the overall process:
* Volcanic Eruption: Molten basalt lava erupts from fissures in the Earth.
* Lava Plateau Formation: The lava flows out, forming a plateau.
* Slow Cooling & Contraction: As this large body of lava cools slowly and evenly, it contracts.
* Stress Cracks: This contraction creates stress patterns and fractures in the rock.
* Column Formation: The cracks propagate inward from the surface and bottom of the lava flow, creating a network of columns.
* Hexagonal Shape: The most efficient way to relieve stress is by forming columns with six sides, which is why they are often hexagonal.
However here, the columns are in all directions. First, the well-known arch
