. Houston is a flat marshy area where an extensive drainage system has been built the adjoining prairie land drains into the city which is prone to flooding. Underpinning Houston's land surface are unconsolidated clays clay shales and poorly cemented sands up to several miles deep the region's geology developed from river deposits formed from the erosion of the Rocky Mountains These sediments consist of a series of sands and clays deposited on decaying organic marine matter that over time transformed into oil and natural gas Beneath the layers of sediment is a water-deposited layer of halite a rock salt the porous layers were compressed over time and forced upward As it pushed upward the salt dragged surrounding sediments into salt dome formations often trapping oil and gas that seeped from the surrounding porous sands the thick rich sometimes black surface soil is suitable for rice farming in suburban outskirts where the city continues to grow, District Name Party First Elected Area(s) of Harris County Represented. .
. 11.3 Cycling Houston has also been the site of numerous industrial disasters and construction accidents in 2019 OSHA found that Texas was the leading state in the nation for crane accidents in Houston a 2008 crane collapse at a refinery killed 4 people and injured 6 the crane that collapsed was one of the largest cranes in the nation possessing a 400-foot boom that can lift more than a million pounds!
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