from the Cambrian-age Krukowski quarry in central Wisconsin, this
ichnofossil called Diplichnites may well represent some of the earliest
animal footprints on land. When these footprints were made, what
is now Wisconsin was some 10 degrees below the equator, and paleontologists
believe the site was once a beach of a shallow marine environment.
shelly animals are found in the Krukowski quarry, only trackways
(Ichnofossils) and body impressions (such as in the case of the
Jellyfish (Cnidarians). Besides a few mysterious trackways that
cannot be named, one finds Diplichnites,
Together, this quarry tells a story just now being researched by
paleontologists - hopefully, the result will be some shedding of
more light on when and how life ventured from marine to
conjecture was that Diplichnites was the trace of a arthropod, such
as wandering Myriapoda, which brings to mind an ancient centipede
(Chilopoda). More recently, the Diplichnites tracks have been ascribed
to a Euthycarcinoid
is a fine specimen that is loaded with many footprints (in the Cambrian-age
sand. Note the curving trackway extending the length of the specimen.
There has been no staining of this hyporelief
specimen and the raised trackway has a naturally darker matrix.
Also note the wide and deep shoreland sand ripples that are prototypical
of many of the Krukowski quarry Ichnofossils plates.