Geologists call a discontinuity in the deposition of sediment an unconformity. It's a physical representation of a gap in the geological record, a material sign of a break in time. ... Life is filled with unconformities—revealing holes in time that are also fissures in feeling, knowledge, and understanding...
The Book of Unconformities is a book centered around geology, written by an anthropologist, inspired by the deaths of the author's two sisters in a span of three months. Each chapter is named for a type of stone (marble, sandstone, magnetite) that Raffles uses as a jumping off point for wide-ranging digressions. For example, the first chapter introduces the Inwood marble that underlays Manhattan and goes on to describe the history of the native Lenape; the "Sandstone" chapter mostly concerns the Neolithic standing stones in the Orkney Islands.
In its best moments, The Book of Unconformities achieves its goal of evoking the theme of disruption on multiple scales at once (geological, societal, and personal); it briefly captures a Sebaldian tone. Most of the time, though, it is telling an interesting story about the history of a place and a people, but without a clear connection to the author's larger concerns. I often found myself asking how we got onto this subject.
I felt a bit smug while reading this book because of how many of its tangents I was already familiar with: eruptions in Iceland, the Clearances in Scotland, Norwegian polar exploration, whaling at Svalbard.