Uncertainty exists in the configuration and extent of the Midcontinent Rift System (MRS)
because of deficiencies in geophysical data and limited information from outcrops and …

In oceanic regions the effective elastic thickness Te of the lithosphere is generally estimated
from the free air gravity field and approximately corresponds to the depth of the 450° C …

De nouvelles analyses U-Pb SHRIMP [Microsonde ionique à haute résolution et à haut
niveau de sensibilité] de zircons provenant de deux tufs et d'une coulée felsique dans le …

The Proterozoic Midcontinent Rift System of North America is remarkably similar to
Phanerozoic rifted continental margins and flood basalt provinces. Like the younger …

The Midcontinent rift is a Middle Proterozoic continental rift which records about 15 my of
extension, subsidence, and voluminous volcanism in the period 1109–1094 Ma in the …

Seismic reflection, gravity, and magnetic data were used along four profiles to study the Mid-
Continent rift system between northwestern Wisconsin and central Iowa. Mafic lavas in …

Geophysical investigations have had a prominent role in studying the 1100 Ma Midcontinent
Rift system because of limited surface exposures and deep drilling of the rift rocks. Gravity …

ABSTRACT The Middle Proterozoic Midcontinent Rift System is one of the world's great
continental rifts. This 1,100-Ma rift, which extends more than 2,000 km across the North …

Abstract The 1.1 Ga Midcontinent rift system of North America is one of the world's major
continental rifts and hosts a variety of mineral deposits. The rocks and mineral deposits of …

Recent drilling of the midcontinent rift system in northeastern Kansas reveals a transposed
Keweenawan stratigraphy of mafic volcanic rocks overlying thick elastic sedimentary rocks …