The stratigraphic importance of trace fossilsis is
relatively small. Cause the life trails are autochtonous, i.e.
considered biological they can be classified to a localized biotope,
they're of particular importance concerning its ecological analysis.
Thus it's possible to to draw conclusions from life trails concerning
faunas living conditions e.g. the ocean beds water aeration, water
depths or also for determination of layers position regarding "top"
But the transition between Proterozoic
and Phanerozoic respectevely the transition from the Ediacarian into the
Cambrian is to support stratigraphical using trace fossils. For this
period of transition, there's a significant increase of trace fossil's
diversity to prove. It is conjecturable, that only now with the
beginning of this transition, lots of marine organisms passed over into
benthic mode of life.
At the latest
now the question comes up for everyone, how it's possible, that such a
volatile mark is able to ride out the process of fossilisation. Then
unlike to fossil marks of e. g. aroused by a sauropod, what is pushed
into the floor by respectable mass and kinetics, our trace fossils were
aroused by a multitude of cleft feets and body structures, whose owner
was holding a body mass, moved with kinemtatic energies, that were
nearly neglibigle, compared to those of the ambient medium water.
The answer lies in the benthic sediments lithification. This
lithification generally describes the process of rock- forming. During
this process, the loose sediment of the seabed is transformed into solid
sedimentary rock at prevailing low temperatures. Due to the grade of
conservation of the trace fossils of our invertebrates, it is
assumed that there barely was appreciable drift at the benthic
floor. The accumulation with filling sediment had to take place without
high force action and masses. This extra load finally led to compression
(compaction) of the trace leadind sediment so as well as the press out
of water. A mineral cement conglomerated, based on dejection of
solutions from soil spaces between sediment cranules, that led to
cementation of the cranules again. Thus loose trace leading sediment was
converted into sedimentary rock.
Considering as example of one of our Diplichnites, the microscopic CCD-
are demonstrating the basic units (sediment cranules) of this trace