Taallalt, Issoumour Mountain

Τααλλάλτ, Ὄρος Ἰσσουμοῦρ

Γεωλογικὸς χρόνος

Σιλούριον Δεβόνιον

Ἡλικία: ~420 ἑκατομμύρια ἔτη
Περίοδος: Ὄψιμον Σιλούριον (Πριδολία)
Σχηματισμός: Ἄγνωστος
Ἐναποθέσεως περιβάλλον: Ὑφαλοκρηπίς ἀνοιχτή, ἐς βαθύτερον ὑπεράκτιον περιβάλλον, κάτωθεν τῆς βάσεως κυμάτων καταιγίδων
Ἀπολιθωμάτων εἴδη: Κρινοειδῆ, ὀρθοκωνικά κεφαλόποδα, ἄλλα θαλάσσια ασπόνδυλα
Παλαιοοικολογία: Ἤρεμα ὑπεράκτια νερά, συσσώρευσις λεπτοῦ ἰζήματος, πλωταὶ κρινοειδῶν ἀποικίαι φερόντων λοβολίθους μετά ἀέρος μεστούς, ἐπεισοδιακὴ μεταφορὰ καὶ ταφή, συνθῆκαι βυθοῦ χαμηλῆς ἐνέργειας

Νόει θάλατταν ἀπέραντον, πόρρω ἐκτεινόμενην πάσης ἀκτῆς. Το προς την ἐπιφάνειαν ὕδωρ καθαρόν και φαιδρόν, πρός δε το βένθος ἐς κυανοῦν σκότος γενόμενον. Ἰλύς λεπτή και ἀσβεστολιθική ὡς βραδέως τῷ πυθμένι κατακάθεται, λευκοῖς ἰζημάτων στρώμασι αὐτόν καλύπτουσα.

Το περιβάλλον σταθερόν τε και χαμηλῆς ἐνεργείας, ἐνίοτε δε διαταρασσόμενον. Μετὰ χρόνου, ὁ πυθμήν ἐς παχείας ἀσβεστολιθικάς και σχιστολιθικάς διαδοχάς καταρτίζεται, τα ἐκεῖ ταφόμενα ὄντα διατηρῶν και στιγμιοτυπῶν οἰκοσύστημά τι ἰδιαίτερον Σιλουριανόν, ἐν ταῖς ἐσχάταις προ τοῦ Δεβονίου ἐποχαῖς.

Taallalt, Issoumour Mountain shown on the globe

†Θαλαμώδη

2 δείγματα

Calyx fragment - ~5cm

4

Calyx fragment with stem - 4-5cm

7

Calyx fragment with stem - 4-5cm

Calyx fragment with stem

Calyx fragment with stem - Cross-section and branching of the stem can be seen

Calyx fragment with stem - Cross-section and branching of the stem can be seen

Calyx fragment with stem

Calyx fragment with stem - Cross-section and branching of the stem can be seen

Calyx fragment with stem - Back side

Κρινοειδῆ

9 δείγματα

Stem fragments - ~2cm

5

Stem and lobolith fragments

5

Stem fragments - ~2cm

7

Stem fragments - ~2cm

Stem fragments

Stem fragments - Cross-section

Stem fragments - Cross-section

Stem fragments

Stem fragments

Stem fragments

Arm segments with pinnules - 2-3cm

7

Arm segments with pinnules - 2-3cm

Arm segments with pinnules - 4 arms stacked on top of each other

Arm segments with pinnules - 4 arms stacked on top of each other

Arm segments with pinnules

Arm segments with pinnules

Stem fragments

Stem fragments

Arm segments with pinnules - ~5cm

7

Arm segments with pinnules - ~5cm

Arm segments with pinnules

Arm segments with pinnules

Arm segments with pinnules

Arm segments with pinnules

Arm segments with pinnules

Arm segments with pinnules - Back side

Arm segments with pinnules - 4-5cm

9

Arm segments with pinnules - 4-5cm

Stem segments

Arm segments with pinnules

Arm segments with pinnules

Arm segments with pinnules

Arm segments with pinnules

Unknown detail

Stem segments

Stem segments, cross-section visible

Stem fragments - ~4cm

6

Stem fragments - ~4cm

Stem fragments

Stem fragments - Cross-section

Stem fragments - Cross-section

Stem fragments

Stem fragments

Various stem fragments - 1-3cm length, 0.6-1.2cm diameter

8

Various stem fragments - 1-3cm length, 0.6-1.2cm diameter

Various stem fragments

Various stem fragments

Various stem fragments

Various stem fragments

Stem fragment of crinoid - Star-shaped axial canal visible in the middle of the cross-section

Stem fragment of crinoid - Star-shaped axial canal visible in the middle of the cross-section. The asymmetry suggests that the fossil has undergone compression.

Stem fragment of crinoid - It appears to have been almost flattened by compression.

Branching arm base - 2-3cm

6

Branching arm base - 2-3cm

Branching arm base - Three branches visible

Branching arm base - Three branches visible

Branching arm base - Cross-section of the base

Branching arm base - Cross-section of the branches

Branching arm base - Three branches visible

Ὀρθοκερατοειδῆ

13 δείγματα

Fragment of an orthoceratoid - 9-10cm

6

Fragment of an orthoceratoid - 9-10cm

Orthoceratoid - ~3cm

Orthoceratoid - ~2cm. Cut along its length, internal structure with chambers visible

Fragment of an orthoceratoid - ~2cm

Fragment of an orthoceratoid - 9-10cm

Cross-section of an orthoceratoid - The siphuncle is visible, slightly off-center

Orthoceratoid - ~4cm

11

Orthoceratoid - ~4cm

Orthoceratoid - ~3cm. Slightly visible chambers due to weathering

Orthoceratoid - ~1cm. Some chambers visible due to breakage

Orthoceratoids of different sizes

Orthoceratoids of different sizes

Orthoceratoid

Small orthoceratoid - 5 chambers visible due to breakage

Orthoceratoids of different sizes

Orthoceratoid - Some chambers visible due to breakage

Orthoceratoids - Back side

Orthoceratoids - Back side, detail. Possible a protoconch

Orthoceratoid - ~10cm

8

Orthoceratoid - ~10cm

Orthoceratoid

Orthoceratoid - 2-3cm

Orthoceratoid

Orthoceratoid - The tip is broken

Orthoceratoid - Cross-section. The siphuncle is faintly visible

Orthoceratoid - Back side

Orthoceratoid - Two walls of the internal chambers are faintly visible

Orthoceratoid - 3-4cm. The chamber walls are faintly visible.

3

Orthoceratoid - ~3cm. The chamber walls can be faintly seen.

4

Orthoceratoid - ~3cm. The chamber walls can be seen, with slightly wavy sutures.

4

Orthoceratoid - ~3cm. The chamber walls can be seen, with slightly wavy sutures.

4

Orthoceratoid - 1-2cm. The chamber walls can be seen.

3

Orthoceratoid - 2-3cm. The chamber walls can be seen.

3

Orthoceratoid - ~1cm. The chamber walls can be seen.

3

Orthoceratoid - 2-3cm.

3

Orthoceratoid - ~1cm.

3

Orthoceratoid - ~1cm. Hard to see

2

†Σκυφοκρινίτης ὁ κομψός

2 δείγματα

Lobolith - ~8cm

6

Lobolith - ~8cm

Lobolith - Broken

Lobolith - Broken. The shape of the inner hollow chamber can be seen.

Lobolith - Crystals formed on the inside.

Lobolith - Crystals formed on the inside.

Lobolith - Crystals formed on the inside.

Stem and lobolith fragments

4

Ἀταξινόμητα

1 δεῖγμα

Unknown - 2-3cm

4