Kaszab Zoltán (szerk.): A Magyar Természettudományi Múzeum évkönyve 76. (Budapest 1984)

Embey-Isztin, A.: Texture types and their relative frequencies in ultramafic and mafic xenoliths from Hungarian alkali basaltic rocks

Most of the Bondoró-hegy peridotite xenoliths (37%) show, however, a peculiar texture type that seems not to be frequently mentioned from nodules of alkali basaltic rocks. Inclusion Bo-1023 is a good example, which is composed of rather equidimensional tabular olivine grains (1-3 mm) with either straight or gently curving boundaries that define a weak foliation. 120° triple point junctions are frequent (Plate II, Fig. 1). Pyroxenes show more irregular outlines as well as spinels which are in interstitial position. Tabular olivines may or may not show strain effects, such as kink bands and undulatory extinction. It is not easy to find an equivalent type in the classification of Mercier & Nicolas neither in that of Nielson Pike & Schwarzman but this texture may correspond to the granuloblastic tabular subtype of Harte. Fig. 3. Three metamoprhic and a presumed igneous texture (Szt-1006)