Cerro La Cruz
Basic information
Sample name: Cerro La Cruz

Reference: A. Solórzano, A. D. Rincón, G. M. Cidade, M. Núñez Flores, and L. Sánchez. 2018. Lower Miocene alligatoroids (Crocodylia) from the Castillo Formation, northwest of Venezuela. Palaeobiodiversity and Palaeoenvironments 99:241-259 [ER 4064]
Geography
Country: Venezuela

State: Lara



Coordinate: 10.35° N, -70.08° W
Coordinate basis: estimated from map

Formation: Castillo

Time interval: Early Miocene

Max Ma: 17.21

Min Ma: 19.27

Geography comments: "Both localities are close to the village of La Mesa, north of the town of Carora, Lara State, along the southern-most exposures of the Sierra de La Baragua in northwest Venezuela"
"Four isotopic ages obtained from analyses of strontium (87Sr/86Sr) ratios suggest that the Cerro La Cruz sequences were deposited during the early Miocene (17.21–
19.27 Ma"

•
Environment
Lithology: siliciclastic (mixed)

Taphonomic context: fluvial deposit

Habitat comments: "The Cerro La Cruz sequence was deposited mainly in near-shore marine environments, probably with brackish facies and local episodes of continental environments in which nonmarine vertebrates are more commonly found"
"Both localities show alternating packages of siliciclastic and carbonate sediments"

Methods
Life forms: other reptiles

Sample size: 11 specimens

Museum: Instituto Venezolano de Investigaciones Científicas (IVIC)

Metadata
Sample number: 4481

Contributor: John Alroy

Enterer: Nicholas Vine

Modifier no: Nicholas Vine

Created: 2024-11-15 22:25:26

Modified: 2024-11-15 22:27:07

Abundance distribution
3 species
0 singletons
total count 11
geometric series index: 4.8
Fisher's α: 1.359
geometric series k: 0.5345
Hurlbert's PIE: 0.4818
Shannon's H: 0.9075
Good's u: 1.0000
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Register
Alligatoroidea indet.2
Purussaurus sp.7
Caiman sp.2