Marble Falls Formation

To accompany this collection the kitchen without electricity display takes visitors back to a simpler time.

Marble falls formation.

The marble falls has great potential to be a prolific tight oil horizontally fractured play. If morrow beds are present at all in type marble falls only a small part of lower part could be so classified and until some evidence of its morrow equivalence is found beds at marble falls should be regarded as post morrow in age. Geologic unit mapped in texas. The marble falls formation is a geologic formation in texas.

List of fossiliferous stratigraphic units in texas. Llano sheet 1981 along colorado river in type section upper 270 ft mostly ls some spiculite beds in upper part. Geologic map of the marble falls area burnet county texas 1 0 1 2 3 km 1 63 360 geology from geologic atlas of texas llano sheet 1431 2147 281 oh ipsw. The marble falls aquifer occurs in several separated outcrops along the northern and eastern flanks of the llano uplift.

The rock has poor primary porosity and according to jim henry a consulting geologist in the area the true marble falls of the fwb is an impure calcareous rock that contains a large amount of silica in the form of sponge spicules quartz sand and shale. The museum boasts an extensive collection of pictures portraying life in the early 1900s. It preserves fossils dating back to the carboniferous period. It is composed primarily of the mineral calcite caco 3 and usually contains other minerals such as clay minerals micas quartz pyrite iron oxides and graphite under the conditions of metamorphism the calcite in the limestone recrystallizes to form a rock that is.

Water occurs in fractures and solution cavities in the limestone of the marble falls formation of the pennsylvanian bend group. Various contributors to the paleobiology database. Presence of fusiform fusulinids in marble falls limestone indicates that formation is post morrow in age. As always the low resistive morrow like shale is found sandwiched between the overlying atokan marble falls formation with contact circa 5860 on the above left 1950 e log of the warren oil 1 cable smith in far northwestern jack county putnam survey a 465 and the underlying chesterian barnett or forestburg formations 5910.

Mostly v fine grained some fine to medium grained in part cherty thin to thick bedded oolitic near middle various shades of brownish gray med gray and olive gray microfossils abundant in most beds. Maximum thickness of the formation is 600 feet but the thickness in burnet. Prior to 2010 approximately 2 500 wells were completed in the marble falls formation.