Analysis of structural non-uniformity of rhyncholites - first results
The modern state of knowledge about rhyncholite structure is considered. Four different structural types are defined. Rhyncholites Akidocheilus (Planecapula) are composed of layers of fine-crystalline and cryptocrystalline calcite; Hadrocheilus (Hadrocheilus) of layers of grained and homogenous cryptocrystalline calcite; Gonatocheilus of heterogeneous cryptocrystalline calcite; and Leptocheilus (Leptocheilus) of homogenous cryptocrystalline calcite. The standing of the differences established in rhyncholite structural types could be referred to as generic or subgeneric.