The Pacific Ocean evolved from the Panthalassic Ocean that was first formed ca 750 Ma with
the rifting apart of Rodinia. By 160 Ma, the first ocean floor ascribed to the current Pacific …

The term Karoo, as applied to igneous rocks, is usually taken to refer to a widespread series
of volcanic and intrusive rocks found in southern Africa south of latitude 14° S and …

Plate motions relative to the hotspots over the past 4 to 7 Myr are investigated with a goal of
determining the shortest time interval over which reliable volcanic propagation rates and …

Lead isotopic compositions of young volcanic rocks from different tectonic environments
have distinctive characteristics. Their differences are evaluated within the framework of …

The third edition of this widely acclaimed textbook provides a comprehensive introduction to
all aspects of global tectonics, and includes major revisions to reflect the most significant …

The available data, mainly topography, geoid, and heat flow, describing hotspots worldwide
are examined to constrain the mechanisms for swell uplift and to obtain fluxes and excess …

The alkalic rocks are here regarded as a category in a classification of igneous rock series
(rock associations) and not as a class in petrographic systematics. The alkalic series as a …

Sr and Nd isotope ratios are reported for 17 mid-ocean ridge basalts and for 11 oceanic
islands and island groups. Data from the Azores, Samoa and the Society Islands diverge …

There are six distinct classes of gold deposits, each represented by metallogenic provinces,
having 100's to> 1000 tonne gold production. The deposit classes are:(1) orogenic gold;(2) …

We forward modeled the Bouguer anomaly in a region encompassing the Pacific Ocean
(85° W) and the Andean margin (60° W) between northern Peru (5° S) and Patagonia (45° …