
1) Sedimentary rock
Found on
https://www.crosswordclues.com/clue/stylolite

an irregular discontinuity or non-structural fracture in limestone and other sedimentary rocks. Stylolites result from compaction and pressure solution during diagenesis.
Found on
http://en.wikipedia.org/wiki/Glossary_of_geology

Stylolites or styolite (Greek: stylos, pillar; lithos, stone) are serrated surfaces within a rock mass at which mineral material has been removed by pressure dissolution, in a process that decreases the total volume of rock. Insoluble minerals, such as clays, pyrite and oxides, remain within the stylolites and make them visible. Sometime host rock...
Found on
http://en.wikipedia.org/wiki/Stylolite

secondary (chemical) sedimentary structure consisting of a series of relatively small, alternating, interlocked, toothlike columns of stone; it is ...
Found on
http://www.britannica.com/eb/a-z/s/176

stylolite A secondary structure found along contacting surfaces of adjacent calcareous rock layers, the contact zone appearing in cross section as a series of jagged interlocking up-and-down projections that resemble a suture or the tracing of a stylus.
Found on
http://www.wordinfo.info/words/index/info/view_unit/2056/

an irregular columnar structure in certain limestones, the columns being approximately at right angles to the bedding planes.
Found on
https://www.infoplease.com/dictionary/stylolite
No exact match found.