11/8/2023 0 Comments Agatized petrified wood![]() ![]() This infilling and replacement of the plant structures with solid silica produced the fossil known as The silica would also replace theįibrous parenchyma. Silica that sometimes precipitated within the hollow xylem and phloem to preserve them. ![]() Ground water flowing through the sediments carried dissolved ![]() Would protect it from oxidation and destructive organisms. When the palm died, it had an opportunity to be preserved as a fossil if it was quickly covered by water and sediments that These tubes transported water, nutrients, wastes, and other materials through the plant. Instead it was a plant that looked similar to a modern palm tree with a trunk made up of parenchyma, a fibrous support material that surrounded hollow tubes of the plant's vascular structure known as xylem and phloem. Palmoxylon did not produce a true "wood" composed of cellulose and lignin. Most specimens are a palm of the genus Palmoxylon, which has been named as the state fossil of Louisiana. Sediments shed, mainly from the uplift of the Rocky Mountains, have since built the coastline seaward to its current position. The most widely known Louisiana gem material is the Oligocene-age " petrified wood" that is found in the Catahoula Formation,Ī sedimentary rock unit that was deposited on the alluvial plains and in the coastal swamps of the Oligocene Gulf Coast.Īt that time, the coastline was about 100 miles farther inland than it is today. ![]()
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