Staten Island's Moravian Cemetery opened in the 1860s, but some remains interred there are considerably older.
The monument, a marker for the burial plot of Civil War Brig. Gen. Stephen H. Weed, recently was found to contain fossils that are between 248 and 540 million years old.
The discovery was made by College of Staten Island geology professor Dr. Alan I. Benimoff during a recent walking tour of the cemetery.
"It's very unusual to find this rock as a headstone," said Dr. Benimoff. "On Staten Island, it would be very hard to see this kind of thing up close. It's extraordinary that they chose this rock for a headstone. It just adds to the culture of Staten Island." [Link]