Stalactites and stalagmites are cave formations made from dripping water that contains the mineral calcite. These formations form very slowly. Fill in the chart for each rate of growth to show how long a stalactite might grow over time. Rate of Growth 1,000 Years 20,000 Years 100,000 Years 200 years = 1 inch 500 years = 1 inch 5 inch 2 inch Zinch 4 inch 2,000 years = 1 inch 5,000 years = 1 inch. If it was 20,000 years and 100,000 years how much inch would it be for 20,000 and 100,000.​