Kaszab Zoltán (szerk.): A Magyar Természettudományi Múzeum évkönyve 72. (Budapest 1980)

Noske-Fazekas, G.: Statistical investigations of plagioclase twin laws in lavas erupted between the Danube and the Central Börzsöny Mountains (Hungary)

Table 3. Frequency of C and A twins and the related An-contens. An % C-twin A-twin Pyroxene andésite 70.8 66 34 Amphibole-pyroxene andésite 64.7 44 56 Amphibole andésite 62.2 40 60 Oxyhornblende andésite 62.2 3664 Biotite andésite 58.9 32 68 Dacite 53.6 35 65 Table 4. An-content of plagioclases in different rock times. AJbite Manebach Carlsbad Acline < Albite-Carlsbad AlbiteAla Pyroxene andésite 71.3 76.0 71.4 69.5 69.3 65.1 Amphibole-pyroxene andésite 65.8 — 63.0 64.3 — 61.6 71.5 Amphibole andésite 62.1 72.0 67.0 '64.1 — 56.4 65.3 Oxyhornblende andésite 63.7 74.5 61.7 59.0 67.0 62.1 — Biotite andésite 66.1 52.0 65.4 60.6 54.0 66.0 — Carbonatic amphibole andésite 60.6 — 60.3 56.5 51.5 59.3 56.3 Inclusion of carbonatic amph. andésite 60.4 61.5 62.1 57.6 57.4 61.3 57.4 Amphibole dacite 66.5 — 65.0 64.3 67.0 61.1 65.0 Biotite dacite 41.7 39.0 42.2 45.2 — 41.3 40.2 Cognate inclusion 65.1 — 59.0 62.6 — 58.8