süljekivid

Could you clarify what "süljekivid" refers to? Is it an Estonian geological term, a place name, or something from a fictional or specialized context? If you provide a bit of context or a source, I can draft a concise, neutral wiki-style article (under 300 words) accordingly. If you’d like, I can also create a neutral stub based on common features of geological entries once I know which sense of the term you intend.