The depositional pattern of CaCO3 and other materials that extend upwards from the floor of a limestone cavern is known as:

Explanation

Stalagmites are speleothems that form upward from the floor of a limestone cave as calcium carbonate precipitates from mineral-rich water dripping from the ceiling. A historically helpful memory device is that stalagmites 'might' reach the roof, while stalactites hold 'tight' to the ceiling.