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wilderone
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"...species went extinct in Baja. It's a remote enough place that it is possible that some animals might have survived the extinction longer on the
peninsula... "
Find Journal of Paleontology 1974, Ralph E. Molnar 48: 1009-1017
re the Cretaceous-Tertiary extinction event which occurred approx. 65.5 million years ago (K-Pg event or K-T Event).
"Scientists theorize the the K-T extinctions were caused by one or more catastrophic events, such as massive asteroid impacts or increased volcanic
activity. Several impact craters and massive volcanic activity such as that in the Deccan traps, have been dated to the approxiamte time of the
extinction event. These geological events may have reduced sunlight and hindered photosynthesis leading to a massive distruption in Earth's ecology.
On March 4, 2010, a panel of 41 scientists agreed that the Chicxulub asteroid impact triggered the mass extinction."
Some studies relating to the age of the hadrosaurs found in two places near El Rosario, state that one site is considerably older than the others. I
would gleen from this that it took hundreds of years for the extinction to occur. Also, similar hadrosaurs were found in La Jolla and Carlsbad,
california, so although Baja is separated from mainland Mex, dino habitat had thousands of miles of continuous North American coast to roam - from
Alaska to Cabo.
See "A Review of Pacific Coast Hadrosaurs", William J. Morris, Journal of Paleontology V.4, No. 3, p. 551-561.
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David K
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| Quote: | Originally posted by bajalera
To update the info on the two flat boards [tablas] mentioned by Homer Aschmann, these were described in "Tabla and Atlatl:Two Unusual Artifacts from
Baja California" (Vol. 8 of the Pacific Coast Archaeologial Society Quarterly, 1972) by Lee Gooding Massey [me].
[Edited on 8-26-2012 by bajalera] |
Does anyone know if this is online or does anyone have it to share?
From Internet, The Index PDF:
Vol. 8(1) January 1972
Special Baja California Number
Shells from the Coasts of Baja California, Brush Drawing
by E. M. Elliott. 8(1):Frontispiece.
Shells from the Coasts of Baja California by Helen C.
Smith. 8(1):1.
The Making of Paddle and Anvil Pottery at Santa Catarina, Baja California, Mexico by Ralph C. Michelsen
and Helen C. Smith. 8(1):2-9.
New Discoveries of Cave Paintings in Baja California by
Ernesto Raul Lopez (Translated by Aileen McKinney). 8(1):10-14.
A Multiple Horizon Cave and Surface Site: Isla de
Cedros Baja California, Mexico by Thomas Jeffrey
Banks. 8(1):15-24.
Tabla and Atlatl: Two Unusual Wooden Artifacts from Baja
California by Lee Gooding Massey. 8(1):25-34.
Notes on the La Huerta Jat́am, Baja California: Place
Names, Hunting, and Shamans by Peveril Meigs.
8(1):35-40.
Chepa: A Kiliwi by Ila Alvarez. 8(1):41-44.
The Oasis of Kadakaamang by Thomas Jeffrey Banks.
8(1):45-60.
Tabla and Atlatl: Two Unusual Wooden Artifacts from Baja California by Lee Gooding Massey. 8(1):25-34
========================================
Massey, Lee Gooding
1968 - Baja's plants and Indians. Desert Magazine, October.
1972 - Tabla and atlatl: two unusual wooden artifacts from Baja California. PCASQ 8(1):25-34.
1974 - Jesuits and Indians: a brief evaluation of three early descriptions of Baja California. PCASQ 10(1):1-12. (Informes de Venegas/Burriel,
Baegert, y Clavijero.)
[Edited on 8-29-2012 by David K]
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elbeau
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| Quote: | Originally posted by David K
Does anyone know if this is online or does anyone have it to share?
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I haven't been able to find it, even the the UT library collections. Anyone else have a copy or know where we can find it?
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Taco de Baja
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| Quote: | Originally posted by elbeau
| Quote: | Originally posted by David K
Does anyone know if this is online or does anyone have it to share?
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I haven't been able to find it, even the the UT library collections. Anyone else have a copy or know where we can find it? |
I have a copy of the PCAS Quarterly Vol. 8(1) January 1972, and can e-mail you a scan of the Tabla and Atlatl paper. Send me a U2U.
Truth generally lies in the coordination of antagonistic opinions
-Herbert Spencer
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John M
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Tablas
I have some tablas information but it'll have to wait until Friday when we get back home. John M
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David K
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U2U sent... and as soon as I have them, I will post here.
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David K
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BajaLera's 1972 article:
Thanks go to Taco de Baja for taking time to scan and send it to me!
The tabla is 1.45 meters long
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elbeau
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Here's a news article from yesterday that relates to similar fossils recently found in Mexico:
http://www.artdaily.org/index.asp?int_sec=2&int_new=5750...
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David K
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Article says that was in Hidalgo (Mainland Mexico)...
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academicanarchist
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Mexican fossils
David. I was checking this old topic, and noted the discovery of fossils at Atotonilco de Tula, which is located in southern Hidalgo just south of
Tula. There is a 16th century convent there I have visited several times. I would note that at several convents I have visited there are displays of
fossils, such as of Mastedons.
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David K
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Thanks Robert... cool you have seen them!
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