Today many modern industries of this city include the manufacturing of automobiles, electronics and electrical equipment, weaponry, textiles, sugar, cement, and chemical products.
en.wikipedia.org The cement that is produced may or may not have the same chemical composition as the sediment.
en.wikipedia.org The majority of silica cements are composed of quartz but can include, chert, opal, feldspars and zeolites.
en.wikipedia.org In subsequent years it was repaired with brick, tile and, ultimately, cement, obscuring the original appearance of the floor.
en.wikipedia.org Industries developed within the port include oil refining, food and salt processing, cement manufacturing, fishing, brewing, and tanning.
en.wikipedia.org