Notes on Greenland trace fossils

Behavioral biology of trace fossils

—The potential of the ichnofossil record for exploring the evolution of behavior has never been fully realized. Some of this is due to the nature of the trace fossil record itself. Equally responsible is the separation of ichnology from the relevant areas of modern behavioral biology. The two disciplines have virtually no concepts, methods, or literature in common. The study of animal behavior ...

Paleoarchean trace fossils in altered volcanic glass.

Microbial corrosion textures in volcanic glass from Cenozoic seafloor basalts and the corresponding titanite replacement microtextures in metamorphosed Paleoarchean pillow lavas have been interpreted as evidence for a deep biosphere dating back in time through the earliest periods of preserved life on earth. This interpretation has been recently challenged for Paleoarchean titanite replacement ...

Precambrian Biota: Protistan Origin of Trace Fossils?

Some Precambrian trace fossils have been presented as evidence for the early origin of bilaterians; the recent finding that large amoeboid protists leave macroscopic traces at the bottom of the deep ocean questions the metazoan nature of early trace fossils, stressing the importance of single-cell organisms in Precambrian biota.

Notes on Silurian Fossils from Ohio and Other Central States

Ray Trace Notes

A MATLAB function that performs a direct numerical integration to the ray optics equation described in book Section 1.3.2 has been implemented. The code, which was written by Dennis Hancock http:nnwww.dennishancock.com, is embodied in the MATLAB function Launch Rays. The function launches a prescribed bundle of rays from a point on the z axis in a rectangular coordinate reference system. Each r...