why do you think some stalactites grow without a stalagmite below them, or some stalagmites grow without a stalactite above them?
First couple of paragraphs. Good diagrams.
http://www.jimloy.com/geology/stalac.htm
why do stalactites grow without a stalagmite
The phenomenon of stalactites growing without stalagmites below them, or vice versa, can occur due to a few different reasons. This is often observed in caves or underground formations with specific geological conditions. Let me explain why this can happen:
1. Differential Growth Rates: Stalactites and stalagmites form when mineral-rich water drips from the ceiling of a cave. Generally, stalactites form first as water droplets trickle down from the cave roof and leave behind mineral deposits. If the cave’s conditions change over time, such as a decrease in water flow or mineral content, the growth of stalactites may slow down or stop, while the existing ones remain. Stalagmites, which grow from the cave floor, can continue to develop if the conditions remain favorable. This disparity in growth rates can result in stalactites without stalagmites or vice versa.
2. Evaporation and Drought: Another factor that might contribute to the absence of a corresponding formation is evaporation or drought. If the water source supplying the cave decreases or dries up, the water droplets necessary for stalactite growth might become scarce. Stalactites require steady dripping to accumulate mineral deposits over time. Without a consistent water source, stalactites may not continue to grow, while already formed stalagmites can remain.
3. Geological Shifts: Geological shifts and changes in the cave formation can also lead to the absence of a corresponding formation. Over time, the dynamics of the underground environment can alter, such as the formation of new passages, closing of existing ones, or changes in water flow patterns. These shifts can disrupt the continuous growth of stalactites or stalagmites, resulting in isolated formations without a counterpart.
In summary, the growth of stalactites and stalagmites is influenced by a variety of factors, including differential growth rates, evaporation or drought, and geological shifts. These factors can cause stalactites to grow without stalagmites or stalagmites to develop without stalactites in certain cave environments.