The most likely service that these fossilized stumps could provide is tourism. Since they are rare and significant specimens of ancient plant life, they attract visitors from all over the world who are interested in paleontology and natural history. While they may have been useful for lumber or shelter in the past, they are now protected as part of a national monument and cannot be harvested or used for those purposes. As for soil creation, while the presence of the stumps and associated plant and animal fossils can provide insights into past ecosystems and environmental conditions, they do not actively contribute to the creation of new soil.