Paleomagnetic Study of the Portage Lake Volcanics exposed in the Quincy Mine

A detailed paleomagnetic and rock-magnetic investigation was conducted on thirty six basaltic flows of the ~1095 Ma Portage Lake Volcanics. The flows were sampled along the East Adit of the Quincy Mine (Hancock, MI). Thirty two flows yielded well-defined primary magnetization directions carried by magnetite. A secondary magnetization component carried by hematite was also found in twenty nine flows. After correction for serial correlation between the flows, nineteen independent mean directions were calculated. The corresponding paleomagnetic pole is located at 25.5 °N, 182.1 °W (A95 = 3.5°). The new pole overlaps with the pole from the ~1087 Ma Lake Shore Traps suggesting a standstill of the North American plate during that time period. The low angular dispersion of virtual geomagnetic poles (S = 7.9°) suggests that the flows were erupted within a short time period, or that the strength of geomagnetic secular variation was lower than that of the recent field.

Verordnung die hypothecarische Sicherung der jüdischen Pupillen Gelder bereffend ... 5. Januar 1775

Von Gottes Gnaden, Wir Wilhelm Landgraf und Erbprinz zu Hessen

Zur Geschichte der Juden in Franken : (1772 - 1775)

Leopold Löwenstein

[Ärztliches Tagebuch: März 1743 - Februar 1744]

Handschrift

Salomon Preisach [Illustration] : geb. 1775 - gest. 1885

Scan von Monochrom-Mikroform

Zu Goethe und die Juden : 1775

Ludwig Geiger

Die Judenverjagung aus Prag im Jahre 1744

Zacharias Frankel

Die englische Intervention zu Gunsten der böhmischen Juden im Jahre 1744

Johann Krengel

Die englische Intervention zu Gunsten der böhmischen Juden im Jahre 1744

Johann Krengel

Wiener Trödeljude [Illustration] : 1775

Chr. Brand

Gottlieb Barckhausens Specimen botanicum sistens fasciculum plantarum ex flora comitatus Lippiaci 1775

Von Prof. Dr. August Schulz

Mus Hs 1744 - Trio für Pianoforte, Clarinett in B & Fagott

von Kreutzer

Christoph Willibald Gluck, Brustbild, 1775

Signatur des Originals: S 36/F00556

Christoph Willibald Gluck, Brustbild, 1775

Signatur des Originals: S 36/F00558