Also during the late 1920s and 1930s, Sears pioneered the study of fossil pollen as a cue to past vegetation and climate in the United States.
12.
There is evidence from fossil pollen that the " Trochetiopsis " lineage has been on Saint Helena since the late Miocene ( some 9.5 million years ).
13.
Fossil pollen of " Itea " has been detected in a short section of the Sarzana Basin in north-western part of central Italy tentatively assigned to the Miocene-Pliocene transition.
14.
Fossil pollen of " Laurelia " has been attributed to the middle Oligocene of New Zealand, as well as the Eocene-Oligocene and Early Miocene of Argentina and Seymour Island.
15.
Fossil pollen named " "'Bluffopollis scabratus " "', found in deposits from the Paleocene to the Miocene, is almost identical to the pollen of " Strasburgeria ", although only half its size.
16.
Palynology, the study of fossil pollens and spores, routinely works out the stratigraphy of rocks by comparing pollen and spore assemblages with those of well-known layers-a tool frequently used by petroleum exploration companies in the search for new fields.
17.
Sears was the first to publish reference drawings of Lake Erie basin fossil pollen types, and published extensively in this field and inspired many students between 1930 and about 1950, by which time his interest in conservation and land use dominated his time.
18.
There is a fossil pollen record going back much further, but it has been shown that " Metrosideros " pollen is very similar morphologically to many other genera within the family Myrtaceae and as such, fossil pollen cannot be reliably used as an oldest record of the genus.
19.
There is a fossil pollen record going back much further, but it has been shown that " Metrosideros " pollen is very similar morphologically to many other genera within the family Myrtaceae and as such, fossil pollen cannot be reliably used as an oldest record of the genus.
20.
One hypothesis was based especially on studies on Triassic-Jurassic basins from Morocco where CAMP lava flows are outcropping ( e . g ., ), whereas the other was based on end-Triassic extinction data from eastern North American basins and lava flows showing an extremely large turnover in fossil pollen, spores ( sporomorphs ), and vertebrates, respectively.
