求翻译：送子观音洞为天然溶洞，据考证形成于两亿多年前的古生代造山运动时期。传说是送子观音道场，凡在此许愿求子，有求必应。是什么意思？

Songziguanyin cave is a natural cave, according to research to form more than 200 million years ago during the Paleozoic orogenic movement. Legends is the songziguanyin Buddhist temple, where this wish sons, responsive.