In 2008, the society published A Field Guide to the Geology of Madeira, by C.J. Burton and J.G. MacDonald, and many copies of this guide have been sold. However, the need has arisen to update some of the information contained in the guide. The great storm of February 2010 changed some of the topography, including the area of Porto da Cruz, and in the same year a new geological map of the island was published along with a revision of the stratigraphy. These and other alterations and additions are reflected in a supplement to the guide, which was up-to-date as of June 2016. This supplement can be viewed and downloaded here.