Tectonic influences on the preservation of marine terraces: Old and new evidence from Santa Catalina Island, California

Geomorphology ◽  
2012 ◽  
Vol 179 ◽  
pp. 208-224 ◽  
Author(s):  
R. Randall Schumann ◽  
Scott A. Minor ◽  
Daniel R. Muhs ◽  
Lindsey T. Groves ◽  
John P. McGeehin
Keyword(s):  
Marine Terraces ◽  
Santa Catalina Island ◽  
New Evidence

Climatostratigraphic Scheme of the Black Sea Pleistocene and its Correlation with the Oxygen-Isotope Scale and Glacial Events

1988 ◽  
Vol 29 (1) ◽  
pp. 1-24 ◽  
Author(s):  
V.A. Zubakov
Keyword(s):  
Black Sea ◽  
Saline Water ◽  
Magnetic Polarity ◽  
The Black Sea ◽  
The Caspian Sea ◽  
Black Sea Region ◽  
Marine Terraces ◽  
Molluscan Fauna ◽  
New Evidence ◽  
A New Species

New evidence from the Asov Sea-Black Sea region shows that after the Cobb Mountain magnetic event (1.1 myr) there were 8 saline water events, with Mediterranean molluscs penetrating into the Asov Sea (five times farther than the western Manych Strait), and 7 or 10 cold freshwater events. During the freshening phase, the Caspian Sea molluscan fauna penetrated into the Black Sea; each time the Caspian mollusc assemblage was characterized by a new species of Didacna. Thus, some 18–20 bioclimatostratigraphic units can be distinguished in the Asov Sea-Black Sea section for the last 1 myr. Their numerical age is estimated by some dozen thermoluminescence dates and 12 magnetic-polarity datum planes. The Karangatian s. lato corresponds to the interval 300,000–50,000 yr, the Uzunlarian to 580,000–300,000 yr, and the Chaudian to 1,100,000–600,000 yr. The Karangatian and Tyrrhenian marine terraces correspond to marine isotope stages 5 and 7, the Uzunlarian and Milazzian to stages 11–15, and the Chaudian and Sicilian to stages 16–28. The number and ages of glacial-interglacial cycles in continental Europe are identical to the climatic cycles in the Black Sea and Mediterranean.

Marine terraces on Santa Catalina Island

1933 ◽  
Vol s5-25 (146) ◽  
pp. 123-136 ◽  
Author(s):  
W. S. T. Smith
Keyword(s):  
Marine Terraces ◽  
Santa Catalina Island

Uplifted marine terraces on Santa Catalina Island, California, USA

Geology ◽  
2021 ◽  
Author(s):  
Margarita McInnis ◽  
Nicholas Pinter
Keyword(s):  
Narrow Band ◽  
The Other ◽  
Channel Islands ◽  
Marine Origin ◽  
Marine Terraces ◽  
California Channel Islands ◽  
Santa Catalina Island ◽  
Harbor Area

Marine terraces are widespread along California’s coastline, including on all of the Channel Islands, with the possible exception of Santa Catalina. For over a century, the origins of subhorizontal surfaces and gravel deposits on Santa Catalina have been debated, with recent suggestions that Santa Catalina has no marine terraces and is subsiding. We mapped, measured, and described terrace deposits on Santa Catalina Island, including both in situ deposits and distributed gravel float. Rounded gravels and cobbles, locally pholad-bored, are present as float across low-relief surfaces in the Little Harbor area. We also mapped and described the Eagles Nest Gravels, an ~8-m-thick package overlying a broad bedrock-cut platform at ~200 m elevation and dipping 3.2° northward. The Eagles Nest Gravels contain rounded cobbles and boulders, many of which contain pholad borings. Two other platforms are inferred from concordant gravels with similar orientations but at lower elevations. Terrace deposits on Santa Catalina truncate underlying lithological units, including a narrow band of fossiliferous Miocene to Pliocene sands. Terrace deposits and gravel lag on Santa Catalina closely resemble older terrace deposits on other California Channel Islands. The terraces on Santa Catalina Island remain undated but document at least 200 m of net uplift, similar to the elevations of undated terraces on the other Channel Islands. While the timing of uplift of Santa Catalina is unclear, analysis of terrace deposits in the Little Harbor area confirms their marine origin and settles the debate regarding the presence of marine terraces on Santa Catalina Island.

scholarly journals Uplifted marine terraces on Santa Catalina Island, California, USA: COMMENT

Geology ◽  
2021 ◽  
Vol 49 (7) ◽  
pp. e529-e529
Author(s):  
Chris M. Castillo ◽  
Simon L. Klemperer
Keyword(s):  
Marine Terraces ◽  
Santa Catalina Island

Systematic effects in observed parallaxes

1978 ◽  
Vol 48 ◽  
pp. 31-35
Author(s):  
R. B. Hanson
Keyword(s):  
Error Estimates ◽  
Zero Point ◽  
Absolute Zero ◽  
Apparent Magnitude ◽  
Coherent System ◽  
Preliminary Results ◽  
General Catalogue ◽  
Systematic Effects ◽  
New Evidence ◽  
Right Ascension

Several outstanding problems affecting the existing parallaxes should be resolved to form a coherent system for the new General Catalogue proposed by van Altena, as well as to improve luminosity calibrations and other parallax applications. Lutz has reviewed several of these problems, such as: (A) systematic differences between observatories, (B) external error estimates, (C) the absolute zero point, and (D) systematic observational effects (in right ascension, declination, apparent magnitude, etc.). Here we explore the use of cluster and spectroscopic parallaxes, and the distributions of observed parallaxes, to bring new evidence to bear on these classic problems. Several preliminary results have been obtained.

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