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JURASSIC ARMORED MUD BALLS, AN OFFICIAL MASSACHUSETTS STATE "SEDIMENTARY STRUCTURE"?
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Lithified Armored Mud Balls are rare! Research indicates that they can only be seen in Franklin County.* They deserve recognition and celebration so they will not " forgotten! Save the Armored Mud Balls! Sign the petition to support these intriguing, amusing and photogenic Mesozoic rarities as the official "State Sedimentary Structure" of Massachusetts. (ruler is 6 incles. This rock is at the Greenfield Community Geology Path.)
https://www.petitions.net/make_armored_mud_balls_a_state_sedimentary_structure?u=6948030
6 minute movie at
*A few other lithified armored mud ball examples are noted in the geological literature, but they are in remote outcrops. For more information, click on the "Armored Mud Balls" category (button in top margin).