The trust that helps protect Te Mata Peak's taonga says they believe the recent theft of multiple fossils is an isolated incident.
Even so, the Te Mata Park Trust Board is now stepping up its calls for visitors to "leave no trace" at one of Hawke's Bay's most sacred sites.
Te Mata Peak was once under water and fossilised shells, barnacles, and even the occasional shark tooth in its cliffs prove that more two million years ago the Hawke's Bay landscape was very different.
Te Mata Park Trust manager Emma Buttle said a group had in November used hammers to remove fossils that were between two and three million years old from rocks, damaging the land and removing natural history that was "not theirs to take".
Buttle said the fossil theft was an isolated occurrence, but has given the Park the opportunity to highlight the importance of protecting both the flora and geological treasures within the Park.