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Successional Speciation in Paleontology: The case of the Oysters of the sellaeformis Stock
Paleontological report containing an examination of an ancient species of stock oyster and four separate successional species of oyster that resulted from that stock. This example is presented under the successional mode of speciation of Julian Huxley.
Date:
1949
Creator:
Stenzel, H. B.
System:
The Portal to Texas History
Correlation of Gravity of the Coal Creek Serpentine Mass, Blanco and Gillespie Counties, Texas
Abstract: "Gravitational observations were made of the pre-Cambrian Coal Creek serpentine mass in Blanco and Gillespie Counties, Texas, the geology of which had been mapped previously. The observed gravitational anomalies indicate roughly the depth of the serpentine mass below which it may possibly grade into its parent peridotitic rock. Probable correlation between the gravitational map and the other geologic features of the area is indicated" (p. 151).
Date:
April 2, 1949
Creator:
Romberg, Frederick & Barnes, Virgil E. (Virgil Everett), 1903-1998
System:
The Portal to Texas History
Texas Annual Morbidity Report: 1948
The report provides data and information about communicable and reportable diseases in Texas during 1948, broken out by county.
Date:
1949
Creator:
Texas. State Department of Health.
System:
The Portal to Texas History
Texas Annual Morbidity Report: 1949
The report provides data and information about communicable and reportable diseases in Texas during 1949, broken out by county.
Date:
1949
Creator:
Texas. State Department of Health.
System:
The Portal to Texas History
Progress Report Number 10 of Silt Load of Texas Streams: 1947-1948
Progress report documenting data collection related to the amount of silt carried by Texas streams and potential effects on water management infrastructure, with an explanation of methods, data broken down by various criteria, and analysis.
Date:
August 1949
Creator:
Bloodgood, Dean W.
System:
The Portal to Texas History