Читать книгу Biogeography in the Sub-Arctic - Группа авторов - Страница 48

This short review on interglacial biotas in Iceland is mainly based on the excellent and richly illustrated review by Grímsson (2011). Five occurrences with plant remains and one with arthropod remains have been described from Iceland, and exposures of two of them are shown in Figure 3 (see Plate section). The ages of the older formations are relatively well constrained from palaeomagnetic studies and by Ar/Ar age determinations of underlying or overlying volcanic rocks. Alnus fossils, referred to Alnaster viridis fossilis, Alnus aff. viridis and Alnus cf. viridis are found in deposits from the four oldest formations (Figure 4). During the Holocene, Alnus did not reach Iceland.