Marine geology: the study of the seafloor; involves geophysical, geochemical, sedimentological and paleontological investigations of the ocean floor and coastal margins.

The uppersides of the anterior wings are black, with a bright blue band from the base of the coastal margin to the apex.

Marine geology or geological oceanography involves geophysical, geochemical, sedimentological and paleontological investigations of the ocean floor and coastal margins.

At the coastal margin, fresh groundwater flowing from inland areas meets with saline groundwater from the ocean.

The infiltrating meteoric water (i.e., rainwater) floats on top of higher density saline water intruding from the coastal margins.

The new understanding is that Bugis speaking settlers from the western Cénrana valley began to settle along the coastal margins around the year AD 1300.

It is experiencing melting along the coastal margin in warming seas and snow accumulation in the hinterlands.

This was due to greater numbers of people moving to the coastal margins and into harm's way.

It lived in the wet coastal margins of Australia and became extinct about 45,000 years ago.

At the same time, tidal water does not reach the interior of the coastal margin, limiting interchange between salt and freshwater ecosystems.