where would you find a conglomerate rock in a river system?

Please answer fast it is for homework and the answer is not even in my textbook! Please help!

"Conglomerates form in environments that are generally not to far from the source of the sediments and high in energy. If the deposit is farther from the source, then the sediment is more likely to be a sandstone with all the large grains left behind. Prehistoric glacial deposits are a great source of conglomerates as are alluvial fans. Anywhere that pebbles are found is a possible source of a conglomerate. …"

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One Response to where would you find a conglomerate rock in a river system?

  1. marcelino angelo says:

    "Conglomerates form in environments that are generally not to far from the source of the sediments and high in energy. If the deposit is farther from the source, then the sediment is more likely to be a sandstone with all the large grains left behind. Prehistoric glacial deposits are a great source of conglomerates as are alluvial fans. Anywhere that pebbles are found is a possible source of a conglomerate. …"
    References :
    http://mineral.galleries.com/rocks/conglomerate.htm