Old Guy, that is how I understand it too.
Found this a few years ago in the SDC Archives.
Marmaros:
Marmaros grew out of a mining settlement built by the incorporators of the Marble Cave Mining and Manufacturing Company. At first an attempt was made to mine lead ore from this cave, but there was not enough lead ore in the cave to make it worthwhile. Then the group of eight business men seven from Lamar, and one from Milford attempted to mine marble from the cave, but it is blighted with imbedded streaks of flint, making it useless.
Then it was learned that the country's largest colony of bats made its home here. The bat droppings were sold for $700 a ton. It was hauled out of the cave on one of the first cave railways and processed into a rich fertilizer in Arkansas. Marmaros thrived as the bat dung capital of the state. It was platted and incorporated about 1881, and became a trade center in the Ozarks wilderness. But the economy of Marmaros was based on only one industry.
Later a Dr. Lynch bought the cave, sight unseen to hunt prehistoric bones. He failed to find the bones in the quantities he had hoped for. Finally, his two daughters came to Stone County to take care of him and his cave. The two sisters showed the cave, providing coveralls for tourists, until 1946. Sometime before that they had changed the name from Marble Cave to Marvel Cave.
A fire in 1894, spelled disaster. A half hearted attempt was made to rebuild the town, but its reason for existence was gone. The guano entrepreneurs decided there wasn't enough of it left to make rebuilding worthwhile.
The post mistress moved her office to a new site near present Kimberling City. A number of Marmaros residents followed. A few die hards stayed on at the old town, but about the only thing left was the pottery works, and after a time it too closed down.
For a time maps of the state showed two towns in Stone County named Marmaros. Eventually the two towns returned to the wilderness.
This is the present site of Silver Dollar City. The parking lot was once the Marmaros school play ground.