The geology of Åland includes Jotnian age sediments from the Proterozoic, such as sandstone, siltstone, arkose, conglomerate and shale. The islands are underlain by plutonic rocks common of the Svecofennian Domain.[1][2]
References[edit]
- ^ Vaasjoki, M.; Korsman, K.; Koistinen, T. (2005). "Overview". Precambrian Geology of Finland Key to the Evolution of the Fennoscandian Shield. Developments in Precambrian Geology. Vol. 14. pp. 1–17. doi:10.1016/S0166-2635(05)80002-7. ISBN 978-0-444-51421-9.
- ^ Salminen, Johanna; Lehtonen, Elina; Mertanen, Satu; Pesonen, Lauri J.; Elming, Sten-Åke; Luoto, Toni (2021). "The Precambrian drift history and paleogeography of Baltica". Ancient Supercontinents and the Paleogeography of Earth. pp. 155–205. doi:10.1016/B978-0-12-818533-9.00015-1. ISBN 978-0-12-818533-9. S2CID 244982213.
Well, that’s interesting to know that Psilotum nudum are known as whisk ferns. Psilotum nudum is the commoner species of the two. While the P. flaccidum is a rare species and is found in the tropical islands. Both the species are usually epiphytic in habit and grow upon tree ferns. These species may also be terrestrial and grow in humus or in the crevices of the rocks.
View the detailed Guide of Psilotum nudum: Detailed Study Of Psilotum Nudum (Whisk Fern), Classification, Anatomy, Reproduction