Data for: Assessment of the eruptive activity and mud breccia’s source and mobilization depth in the Olimpi mud volcano field, Eastern Mediterranean

Particle size frequency distributions in the mud breccias of Gelendzhik MV, Moscow MV, Milano MV, Leipzig MV and Heraklion MV格连吉克（Gelendzhik）MV、莫斯科（Moscow）MV、米兰（Milano）MV、莱比锡（Leipzig）MV及伊拉克利翁（Heraklion）MV泥质角砾岩的粒度频率分布