Amalgam (chemistry) gold") would not be extractable from ore using hydro-mechanical methods. Large amounts of mercury were used in "placer mining", where deposits composed largely of decomposed granite slurry were separated in long runs of "riffle boxes", with mercury dumped in at the head of the run. The amalgam formed is a heavy solid mass of dull gray color. (The use of mercury in 19th century placer mining in California, now prohibited, has caused extensive pollution problems in riverine and estuarine environments, ongoing to this day.) Sometimes substantial slugs of amalgam are found in downstream river and creek bottoms by amateur wet-suited
Amalgam Comics Amalgam Comics Amalgam Comics was a publishing imprint shared by DC Comics and Marvel Comics, in which the two comic book publishers merged their characters into new ones (e.g., DC Comics' the Batman and Marvel Comics' Wolverine became the Amalgam character the Dark Claw). These characters first appeared in a series of twelve comic books which were published in 1996, between the third and fourth issues of the "DC vs. Marvel" miniseries. A second set of twelve comic books followed one year later. The "Official Handbook of the Marvel Universe: Alternate Universes 2005" designated the Amalgam Universe as Earth-9602. DC