Abstract
The Picos de Europa and Puentellés Formations described from northern Spain belong to the Cantabrian Zone. These formations consist mainly of carbonates deposited under shallow platform conditions. Twenty-four samples were studied. A diversified but relatively rare microflora has been obtained. The spores and pollen grains often possessed a wall with numerous small pits related to the presence of abundant pyrite (cube and spherical mass) in the sediment. In the associations, the large forms of pollen ( Potonieisporites-Florinites) are very common. With the exception of Laevigatosporites, monolete spores ( Punctatosporites, Spinosporites, Torispora, Thymospora) are rare. A comparison with the range chart of Clayton et al. (1977) indicates that an age in the upper part of Westphalian D to Stephanian A is in agreement with the faunal results.
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